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![Proceedings [of the] fourth National Conservation Congress [at] Indianapolis, October 1-4, 1912](/_next/image?url=https%3A%2F%2Fstoryroom.app%2Ffiles%2Fimages%2F60000%2F69706.jpg&w=256&q=75)
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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The Holy Earth
Bailey, L. H. (Liberty Hyde)
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Conservation Through Engineering Extract from the Annual Report of the Secretary of the Interior
Lane, Franklin K.
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The Rural Life Problem of the United States Notes of an Irish Observer
Plunkett, Horace Curzon
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Conservation Reader
Fairbanks, Harold W. (Harold Wellman)
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A Review of the Resources and Industries of the State of Washington, 1909
Howell, Ithamar M. (Ithamar Martindale)