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Conference papers and proceedings

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Cover of Proceedings [of the] fourth National Conservation Congress [at] Indianapolis, October 1-4, 1912

Proceedings [of the] fourth National Conservation Congress [at] Indianapolis, October 1-4, 1912

United States. National Conservation Congress

2.8
Cover of Proceedings of the second National Conservation Congress at Saint Paul, September 5-8, 1910

Proceedings of the second National Conservation Congress at Saint Paul, September 5-8, 1910

United States. National Conservation Congress

5.0