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  1. 281
    Proceedings of second Pan American scientific congress : relation between quantity of irrigation water used and quantity of crop produced /

    Proceedings of second Pan American scientific congress : relation between quantity of irrigation water used and quantity of crop produced / by Widtsoe, John A.

    Article
  2. 282
    Proceedings of second Pan American scientific congress : adaptation of methods of applying water to soils /

    Proceedings of second Pan American scientific congress : adaptation of methods of applying water to soils / by Harding, S. T.

    Article
  3. 283
    Proceedings of second Pan American scientific congress : memoire sur la houille blanche au Brésil et ses applications /

    Proceedings of second Pan American scientific congress : memoire sur la houille blanche au Brésil et ses applications / by Paes Leme, Luiz Betim

    Article
  4. 284
    Proceedings of second Pan American scientific congress : hydroelectric utilization at Niagara and elsewhere /

    Proceedings of second Pan American scientific congress : hydroelectric utilization at Niagara and elsewhere / by Deutsch, Maurice

    Article
  5. 285
    Proceedings of second Pan American scientific congress : irrigation districts in the United States /

    Proceedings of second Pan American scientific congress : irrigation districts in the United States / by Adams, Frank

    Article
  6. 286
    Proceedings of second Pan American scientific congress : uniformity of distribution of moisture in soils /

    Proceedings of second Pan American scientific congress : uniformity of distribution of moisture in soils / by Fuller, P. E.

    Article
  7. 287
    Proceedings of second Pan American scientific congress : petroleum and asphalt in the United States /

    Proceedings of second Pan American scientific congress : petroleum and asphalt in the United States / by Shaw, Eugene Wesley

    Article
  8. 288
    Proceedings of second Pan American scientific congress : outline of the petroleum resources of Ecuador /

    Proceedings of second Pan American scientific congress : outline of the petroleum resources of Ecuador / by Andrade, César D.

    Article
  9. 289
    Proceedings of second Pan American scientific congress : conservation of the oil and gas resources of the Americans /

    Proceedings of second Pan American scientific congress : conservation of the oil and gas resources of the Americans / by Arnold, Ralph

    Article
  10. 290
    Proceedings of second Pan American scientific congress : the petroleum industry of Mexico /

    Proceedings of second Pan American scientific congress : the petroleum industry of Mexico / by Day, David T.

    Article
  11. 291
    Proceedings of second Pan American scientific congress : the conservation of copper /

    Proceedings of second Pan American scientific congress : the conservation of copper / by Emmons, W. H.

    Article
  12. 292
    Proceedings of second Pan American scientific congress : conservation of metals by the recovery and use of scrap metals and drosses /

    Proceedings of second Pan American scientific congress : conservation of metals by the recovery and use of scrap metals and drosses / by Dunlop, John P.

    Article
  13. 293
    Proceedings of second Pan American scientific congress : irrigation and drainage /

    Proceedings of second Pan American scientific congress : irrigation and drainage / by Newell, F. H.

    Article
  14. 294
    Proceedings of second Pan American scientific congress : engineering work of the United States reclamation service /

    Proceedings of second Pan American scientific congress : engineering work of the United States reclamation service / by Davis, Arthur Powell

    Article
  15. 295
    Proceedings of second Pan American scientific congress : irrigation work of the United States Indian service /

    Proceedings of second Pan American scientific congress : irrigation work of the United States Indian service / by Reed, W. M.

    Article
  16. 296
    Proceedings of second Pan American scientific congress : the combination of water resources for irrigation and power development /

    Proceedings of second Pan American scientific congress : the combination of water resources for irrigation and power development / by Anderson, G. G.

    Article
  17. 297
    Proceedings of second Pan American scientific congress : the function of live stock in agriculture /

    Proceedings of second Pan American scientific congress : the function of live stock in agriculture / by Rommel, George M.

    Article
  18. 298
    Proceedings of second Pan American scientific congress : the horse in rural industry and recreation /

    Proceedings of second Pan American scientific congress : the horse in rural industry and recreation / by Gay, Carl Warren

    Article
  19. 299
    Proceedings of second Pan American scientific congress : relation between wool and mutton production in North and South American sheep industries /

    Proceedings of second Pan American scientific congress : relation between wool and mutton production in North and South American sheep industries / by Marshall, F. R.

    Article
  20. 300
    Proceedings of second Pan American scientific congress : government control of grazing on the public lands /

    Proceedings of second Pan American scientific congress : government control of grazing on the public lands / by Potter, Albert F.

    Article

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