Books in Category: Environmental Issues (sorted by popularity)
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Rocky Mountain National Park [Colorado] United States. Department of the Interior 183 downloads
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The Washington Peace Carillon James Marion Shull 183 downloads
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Sewage Disposal on the Farm, and Protection of Drinking Water Theobald Smith 183 downloads
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Landesverein Sächsischer Heimatschutz — Mitteilungen Band X, Heft 4-6 : Monatsschrift für Heimatschutz und Denkmalpflege (German) Landesverein Sächsischer Heimatschutz 183 downloads
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Climate and Time in Their Geological Relations James Croll 183 downloads
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L'Illustration, No. 0038, 18 Novembre 1843 (French) Various 182 downloads
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Cumberland Island: Junior Ranger Program Activity Guide for Ages 5-7 United States. National Park Service 180 downloads
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The Underworld of Oregon Caves National Monument Roger J. Contor 180 downloads
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Volcanoes Robert I. Tilling 180 downloads
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Montezuma National Forest, Colorado (1939) United States. Forest Service. Rocky Mountain Region 179 downloads
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Rodent Control Aided by Emergency Conservation Work Stanley Paul Young 178 downloads
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Report on the New York Botanical Garden Olmsted Brothers 178 downloads
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Thoughts on the Proposed Inclosure of Waltham (commonly called Epping) and Hainault Forests Thomas Street 178 downloads
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Colonisação de Lourenço Marques: Conferencia feita em 13 de março de 1897 (Portuguese) Alfredo Augusto Freire de Andrade 178 downloads
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In het Balkanbergland van Bulgarije (Dutch) L. de Launay 177 downloads
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Els aucells més útils a la agricultura de Catalunya (Catalan) Emili Tarré 177 downloads
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Water and power for San Francisco from Hetch-Hetchy Valley in Yosemite National Park Martin Samuel Vilas 175 downloads
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Water Power for the Farm and Country Home David R. Cooper 175 downloads
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The Protection of Fresh-Water Mussels R. E. Coker 175 downloads
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The Vailan or annular theory: A synopsis of Prof. I. N. Vail's argument in support of the claim that this Earth once possessed a Saturn-like system of rings Stephen Bowers 175 downloads
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Sewage and Garbage Disposal on the Farm J. W. Rockey and Joseph Winslow Simons 174 downloads
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Os Cataventos (Portuguese) Rocha Peixoto 173 downloads
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The Sanitary Condition of the Poor in Relation to Disease, Poverty, and Crime Benson Baker 173 downloads
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Some Common Birds Useful to the Farmer (1915 edition) F. E. L. Beal 173 downloads
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Forestry for Farmers B. E. Fernow 172 downloads