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

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

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

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

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

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Manejo de nuestros recursos naturales / by Camp, William G.

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Patrones de diversidad de anfibios del Chaco Árido de la Provincia de Córdoba y sus relaciones con el paisaje y las características locales del hábitat. by Lescano, Julián Norberto

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Recursos naturales renovables : recopilación de obras / by Beltran, Enrique

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Fundamentals of ecology / by Odum, Eugene P.

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

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Cuidar la tierra : estrategia para el futuro de la vida /

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

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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 : principles of a Federal water-power policy for the public lands of the United States / by Merrill, O. C.

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Proceedings of second Pan American scientific congress : the water-power resources of the United States - coordination in the development of our water-power resources with other us... by Leighton, M. O.

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Proceedings of the second Pan American scientific congress : the doctrine of riparian rights, in the western United States / by Chandler, A. E.

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

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

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Proceedings of second Pan American scientific congress : the water requirement of plants as influenced by enviroment / by Briggs, Lyman J.

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Codificación y comentario de normas internacionales ambientales : vigentes en la República Argentina y en el MERCOSUR /

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