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  1. 81
    Proceedings of the second Pan American scientific congress : contribución al estudio de la figura de la tierra - sobre el notable paralelismo de los sistemas de montañas del globo /

    Proceedings of the second Pan American scientific congress : contribución al estudio de la figura de la tierra - sobre el notable paralelismo de los sistemas de montañas del globo... by Sandoval, Luis Matamoros

    Article
  2. 82
    Proceedings of the second Pan American scientific congress : the prospect for marketing South American zinc ore /

    Proceedings of the second Pan American scientific congress : the prospect for marketing South American zinc ore / by Ingalls, W. R.

    Article
  3. 83
    Proceedings of the second Pan American scientific congress : lead and zinc resources of the United States /

    Proceedings of the second Pan American scientific congress : lead and zinc resources of the United States / by Siebenthal, C. E.

    Article
  4. 84
    Proceedings of the second Pan American scientific congress : iron ores of the Americas /

    Proceedings of the second Pan American scientific congress : iron ores of the Americas / by Leith, C. K.

    Article
  5. 85
    Proceedings of the second Pan American scientific congress : datos para la historia de la minería en la República de Guatemala /

    Proceedings of the second Pan American scientific congress : datos para la historia de la minería en la República de Guatemala / by Lemus, Manuel

    Article
  6. 86
    Proceedings of the second Pan American scientific congress : la industria del petróleo en el Perú durante 1915 /

    Proceedings of the second Pan American scientific congress : la industria del petróleo en el Perú durante 1915 / by Deustua, Ricardo A.

    Article
  7. 87
    Proceedings of the second Pan American scientific congress : mining, the pioneer of intimate commercial relations /

    Proceedings of the second Pan American scientific congress : mining, the pioneer of intimate commercial relations / by Sharpless, Frederick F.

    Article
  8. 88
    Proceedings of the second Pan American scientific congress : value of mining property, a discussion of the relations between morthern capital and South American mines /

    Proceedings of the second Pan American scientific congress : value of mining property, a discussion of the relations between morthern capital and South American mines / by Finlay, J. R.

    Article
  9. 89
    Proceedings of the second Pan American scientific congress : Mine of Chile Exploration Co., Chuquicanata, Chile /

    Proceedings of the second Pan American scientific congress : Mine of Chile Exploration Co., Chuquicanata, Chile / by Yeaman, Pope

    Article
  10. 90
    Proceedings of the second Pan American scientific congress : the history and development of gold dredgind in Montana /

    Proceedings of the second Pan American scientific congress : the history and development of gold dredgind in Montana / by Jennungs, Hennen

    Article
  11. 91
    Proceedings of the second Pan American scientific congress : placer-mining methods and operating costs /

    Proceedings of the second Pan American scientific congress : placer-mining methods and operating costs / by Janin, Charles

    Article
  12. 92
    Congreso Científico Panamericano (2 : 1915-1916 : Washington).

    Congreso Científico Panamericano (2 : 1915-1916 : Washington).

    Published 1917
    Conference Proceeding Book
  13. 93
    Congreso Científico Panamericano (2 : 1915-1916 : Washington).

    Congreso Científico Panamericano (2 : 1915-1916 : Washington).

    Published 1917
    Conference Proceeding Book
  14. 94
    Comercio y metalúrgicos : textos legales de los convenios colectivos. Características principales. Liquidación de remuneraciones /

    Comercio y metalúrgicos : textos legales de los convenios colectivos. Características principales. Liquidación de remuneraciones / by Agüero, Alicia María

    Published 1991
    Book
  15. 95
    Metalurgia del oro /

    Metalurgia del oro / by Rubio de la Torre, Juan

    Published 1935
    Book
  16. 96
    Boletín Informativo /

    Boletín Informativo /

    Published 1976
    Book
  17. 97
    Laboratorio de ensayos industriales : metales /

    Laboratorio de ensayos industriales : metales / by González Arias, Antonio

    Published 1986
    Book
  18. 98
    Enciclopedia de química industrial /

    Enciclopedia de química industrial / by Ullmann, Fritz 1875-1939

    Published 1950
    Book
  19. 99
    Edad del hierro.

    Edad del hierro. by Gómez Ramos, Pablo

    Article
  20. 100
    Química /

    Química / by Chang, Raymond, 1939-

    Published 2007
    Book

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