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  1. 1
    Proceedings of the second Pan American scientific congress : legal and economic factors in the conservation of oil and gas /

    Proceedings of the second Pan American scientific congress : legal and economic factors in the conservation of oil and gas / by Johnson, Roswell H.

    Subjects:
    Article
  2. 2
    Proceedings of the second Pan American scientific congress : conservation of iron ore /

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

    Subjects:
    Article
  3. 3
    Proceedings of the second Pan American scientific congress : improvement in mining and metallurgy an aid to conservation /

    Proceedings of the second Pan American scientific congress : improvement in mining and metallurgy an aid to conservation / by Ricketts, L. D.

    Subjects: “…MINERIA-METALURGIA-CONSERVACION…”
    Article
  4. 4
    Proceedings of the second Pan American scientific congress : practical difficultives of conserving our fuel supply /

    Proceedings of the second Pan American scientific congress : practical difficultives of conserving our fuel supply / by Burraws, J. S.

    Subjects:
    Article
  5. 5
    Proceedings of the second Pan American scientific congress : the conservation of phosphate rock in the United States /

    Proceedings of the second Pan American scientific congress : the conservation of phosphate rock in the United States / by Phalen, W. C.

    Subjects:
    Article
  6. 6
    Congreso Científico Panamericano (2 : 1915-1916 : Washington).

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

    Published 1917
    Subjects:
    Conference Proceeding Book

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