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Material Type: Informe
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Report on the Comprehensive Survey of the Water Resources of the Delaware River Basin. Volume I. Main ReportARMY ENGINEER DISTRICT PHILADELPHIA PA1961Texto completo disponible |
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2 |
Material Type: Artículo
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OUTDOOR RECREATION—-SOME SOCIO-ECONOMIC CONSIDERATIONSFischer, John L.Proceedings of the annual meeting (Western Farm Economics Association), 1962-08, Vol.35, p.32-37Western Farm Economics AssociationTexto completo disponible |
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3 |
Material Type: Informe
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