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

Subjects: “…RECURSOS NATURALES…”

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

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

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

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

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

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Proceedings of second Pan American scientific congress : truck marketing on a large scale under cooperative principles / by Wescott, N. P.

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Proceedings of second Pan American scientific congress : the agricultural college and the working farmer / by Butterfield, Kenyon L.

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Proceedings of second Pan American scientific congress : transportation of perishable commodities, need of cooperation by shippers with carriers / by McPike, Eugene F.

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Proceedings of second Pan American scientific congress : the extent and possibilities of cooperation / by Bassett, C. E.

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Proceedings of second Pan American scientific congress : uniform grades and standard packages / by More, C. T.

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

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Proceedings of second Pan American scientific congress : possibilities of intensive agriculture in tropical America / by Cook, O. F.

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Proceedings of second Pan American scientific congress : the role of the dairy industry in a system of national agricultural development / by Rawl, B. H.

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Proceedings of second Pan American scientific congress : financing cooperative marketing associations / by Kerr, W. H.

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Proceedings of second Pan American scientific congress : the principles and practices of cooperation applied to citrus production and distribution / by Powell, G. Harold

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Proceedings of second Pan American scientific congress : conservación de las plantas industriales / by Piñol Batres, Rafael

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Proceedings of second Pan American scientific congress : el manganeso en la capa arable del Uruguay / by Maimo Sarrasín, J.

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Proceedings of second Pan American scientific congress : the economic value of the auction as a distributor of perishable commodities / by McElheny, Victor K.

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Proceedings of second Pan American scientific congress : state aid to irrigation and swamp land reclamation projects / by Grunsky, C. E.

Subjects: “…RECURSOS NATURALES…”