Books in Category: Environmental Issues (sorted alphabetically)
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Personal Narrative of Travels to the Equinoctial Regions of America, During the Year 1799-1804 — Volume 3 Alexander von Humboldt and Aimé Bonpland
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Petrified Forest National Monument (1953) United States. National Park Service
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Petrified Forest National Monument, Arizona Dama Margaret Smith
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Plague at Marseilles Consider'd Richard Bradley
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Pohjoisnavalta päiväntasaajalle: Helppotajuisia esitelmiä (Finnish) Alfred Edmund Brehm
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Poisonous Dwellers of the Desert Natt N. Dodge
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Polarforskningen (Swedish) A. G. Nathorst
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Polar World G. Hartwig
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Practical Forestry in the Pacific Northwest E. T. Allen
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Practical Methods of Sewage Disposal for Residences, Hotels and Institutions Henry N. Ogden and H. Burdett Cleveland
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Preservation of forests as a measure of public safety Lourenço Baeta Neves
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Preserving Louisiana's Legacy: Everyone Can Help Nancy W. Hawkins
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Proceedings [of the] fourth National Conservation Congress [at] Indianapolis, October 1-4, 1912 United States. National Conservation Congress
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Proceedings of the second National Conservation Congress at Saint Paul, September 5-8, 1910 United States. National Conservation Congress
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Protection of Fresh-Water Mussels R. E. Coker
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Psychological Aspects of the Problem of Atmospheric Smoke Pollution J. E. Wallace Wallin
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Quo vadimus? : Some glimpses of the future E. E. Fournier d'Albe
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Ragnarok : the Age of Fire and Gravel Ignatius Donnelly
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Rainbow Bridge National Monument, Utah (1951) United States. National Park Service
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Rapport sur une mission botanique exécutée en 1884 dans la région saharienne, au nord des grands chotts et dans les îles de la côte orientale de la Tunisie (French) Napoléon Doumet-Adanson
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Rapport sur une mission botanique exécutée en 1884 dans le nord, le sud et l'ouest de la Tunisie (French) A. Letourneux
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Reise in die Aequinoctial-Gegenden des neuen Continents. Band 2. (German) Alexander von Humboldt
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Reise in die Aequinoctial-Gegenden des neuen Continents. Band 3. (German) Alexander von Humboldt
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Reise in die Aequinoctial-Gegenden des neuen Continents. Band 4. (German) Alexander von Humboldt
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Remarks on the management, or rather, the mis-management of woods, plantations, and hedge-row timber J. West