Proceedings of second Pan American scientific congress : conservation and economic theory / by Ely, Richard T.

Subjects: “…RECURSOS NATURALES…”

Recursos Naturales, una secretaría aún en penumbras. by Berri, Urien Jorge

Subjects: “…RECURSOS NATURALES…”

Proceedings of second Pan American scientific congress : conservation in its relation to industrial evolution / by Hess, Ralph Henry

Subjects: “…RECURSOS NATURALES…”

Proceedings of second Pan American scientific congress : the people's interest in water-power resources / by Smith, George Otis

Subjects: “…RECURSOS NATURALES…”

Proceedings of second Pan American scientific congress : irrigation in the United States / by Fortier, Samuel

Subjects: “…RECURSOS NATURALES…”

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

Subjects: “…RECURSOS NATURALES…”

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

Subjects: “…RECURSOS NATURALES…”

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

Subjects: “…RECURSOS NATURALES…”

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

Subjects: “…RECURSOS NATURALES…”

Proceedings of second Pan American scientific congress : great central markets for live stock and meats / by Hall, Louis D.

Subjects: “…RECURSOS NATURALES…”

Proceedings of second Pan American scientific congress : the advisability of collegiate courses on marketing and distribution / by Carver, T. N.

Subjects: “…RECURSOS NATURALES…”

Proceedings of second Pan American scientific congress : opportunities afforded the railroads of the United States for profitable agricultural development work / by Powell, T. F.

Subjects: “…RECURSOS NATURALES…”

Proceedings of second Pan American scientific congress : securing settlers for private irrigation projects / by Shedd, H. G.

Subjects: “…RECURSOS NATURALES…”

Proceedings of second Pan American scientific congress : the valuation of water powers / by Hagenah, William J.

Subjects: “…RECURSOS NATURALES…”

Proceedings of second Pan American scientific congress : the institute of tropical agriculture of the Pacific coast / by Webber, Herbert J.

Subjects: “…RECURSOS NATURALES…”

Proceedings of second Pan American scientific congress : the development of a market news service / by Sherman, Wells A.

Subjects: “…RECURSOS NATURALES…”

Proceedings of second Pan American scientific congress : organization by consumers / by Smith, Herbert A.

Subjects: “…RECURSOS NATURALES…”

Proceedings of second Pan American scientific congress : the Federal Government and the Nation's mineral resources / by Mendenhall, W. C.

Subjects: “…RECURSOS NATURALES…”

Proceedings of second Pan American scientific congress : trabajos filotécnicos y de experimentación agrícola en La Estanzuela, República Oriental del Uruguay / by Boerger, Alberto

Subjects: “…RECURSOS NATURALES…”

Proceedings of second Pan American scientific congress : car-lot distribution / by Crutchfield, J. S.

Subjects: “…RECURSOS NATURALES…”