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  1. 21
    Proceedings of the second Pan American scientific congress : Cuban iron mines and methods /

    Proceedings of the second Pan American scientific congress : Cuban iron mines and methods / by Little, James E.

    Article
  2. 22
    Proceedings of the second Pan American scientific congress : the value of scientific research and laboratory control in the manufacture of foods /

    Proceedings of the second Pan American scientific congress : the value of scientific research and laboratory control in the manufacture of foods / by Bigelow, W. D.

    Article
  3. 23
    Proceedings of the second Pan American scientific congress : contribución al análisis toxicológico del mercurio /

    Proceedings of the second Pan American scientific congress : contribución al análisis toxicológico del mercurio / by Renson, Carlos

    Article
  4. 24
    Proceedings of the second Pan American scientific congress : metallurgy of tin ores in Bolivia /

    Proceedings of the second Pan American scientific congress : metallurgy of tin ores in Bolivia / by Hollister, Scoville E.

    Article
  5. 25
    Proceedings of the second Pan American scientific congress : Bolivian tin and its relation to the United States /

    Proceedings of the second Pan American scientific congress : Bolivian tin and its relation to the United States / by Bancroft, Howland

    Article
  6. 26
    Proceedings of the second Pan American scientific congress : coal fields of the United States considered as sources of supply for the western hemisphere /

    Proceedings of the second Pan American scientific congress : coal fields of the United States considered as sources of supply for the western hemisphere / by Campbell, Marius R.

    Article
  7. 27
    Proceedings of the second Pan American scientific congress : the occurrence and preparation of radium and associated metals /

    Proceedings of the second Pan American scientific congress : the occurrence and preparation of radium and associated metals / by Parsons, Charles L.

    Article
  8. 28
    Proceedings of the second Pan American scientific congress : geologia general y económica de Colombia /

    Proceedings of the second Pan American scientific congress : geologia general y económica de Colombia / by Ospina, Tulio

    Article
  9. 29
    Proceedings of the second Pan American scientific congress : the cement industry and its future development /

    Proceedings of the second Pan American scientific congress : the cement industry and its future development / by Eckel, Edwin C.

    Article
  10. 30
    Proceedings of the second Pan American scientific congress : reseña geológica del departamento de Cundinamarca, cordillera oriental de los Andes colombianos /

    Proceedings of the second Pan American scientific congress : reseña geológica del departamento de Cundinamarca, cordillera oriental de los Andes colombianos / by Lleras Codazzi, Ricardo

    Article
  11. 31
    Proceedings of the second Pan American scientific congress : geología general de la República de El Salvador, en lo que se relaciona con la minería /

    Proceedings of the second Pan American scientific congress : geología general de la República de El Salvador, en lo que se relaciona con la minería / by Fleury, Luis

    Article
  12. 32
    Proceedings of the second Pan American scientific congress : rubbler /

    Proceedings of the second Pan American scientific congress : rubbler / by Walker, Percy H.

    Article
  13. 33
    Proceedings of the second Pan American scientific congress : chemical research as a directing aid in the efficient utilization of pine forests /

    Proceedings of the second Pan American scientific congress : chemical research as a directing aid in the efficient utilization of pine forests / by Herty, Charles H.

    Article
  14. 34
    Proceedings of the second Pan American scientific congress : mining costs and selling prices of coal in the United States and Europe, with special reference to export trade /

    Proceedings of the second Pan American scientific congress : mining costs and selling prices of coal in the United States and Europe, with special reference to export trade / by Rice, George S.

    Article
  15. 35
    Proceedings of the second Pan American scientific congress : cooper in America /

    Proceedings of the second Pan American scientific congress : cooper in America / by Weed, Walter Harvey

    Article
  16. 36
    Proceedings of the second Pan American scientific congress : mineralogía, metalurgia y geología económica /

    Proceedings of the second Pan American scientific congress : mineralogía, metalurgia y geología económica / by Fleury, Luis

    Article
  17. 37
    Proceedings of the second Pan American scientific congress : the hydrometallurgical treatment of complex gold and silver ores /

    Proceedings of the second Pan American scientific congress : the hydrometallurgical treatment of complex gold and silver ores / by Clevenger, G. H.

    Article
  18. 38
    Proceedings of the second Pan American scientific congress : the field for cyaniding in South America /

    Proceedings of the second Pan American scientific congress : the field for cyaniding in South America / by Megraw, Herbert A.

    Article
  19. 39
    Proceedings of the second Pan American scientific congress : metalurgy of native silver ores of southwestern Chihuahua /

    Proceedings of the second Pan American scientific congress : metalurgy of native silver ores of southwestern Chihuahua / by Brodie, W. M.

    Article
  20. 40
    Proceedings of the second Pan American scientific congress : estudio sobre concentración y metalurgia, concretado al mineral de San Antonio de Oriente /

    Proceedings of the second Pan American scientific congress : estudio sobre concentración y metalurgia, concretado al mineral de San Antonio de Oriente / by Callejas, Juan Miguel

    Article

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