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

Valuing the environment : proceedings of the first annual International Conference on Environmentally Sustainable Development held at the World Bank, Washington, D.C., September 30-October 1, 1993 /

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Proceedings of the World Bank Annual Conference on Development Economics /

First world conference on national parks /

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

Costal California /

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

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

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

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

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

Proceedings of second Pan American scientific congress : standardization of vegetables / by Cook, S. J.

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

USA its geography and growth /

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

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

Proceedings of second Pan American scientific congress : influence of supply on prices / by Chaney, A. U.

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

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

Proceedings of second Pan American scientific congress : relation of the government to the marketing problem / by Galloway, Beverly T.