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By: Ayres, Robert W. (Robert William),Edition:Publication info: Washington, D.C, U.S. G.P.O, 1927Volume: no.94Series:Holding Institution: U.S. Department of Agriculture, National Agricultural LibrarySubjects:BHL Collections:
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By: Ayres, Robert W. (Robert William), - Hutchinson, Wallace I. (Wallace Irving),Edition:Publication info: Washington, D.C, U.S. Dept. of Agriculture, 1931Volume: no.109Series:Holding Institution: U.S. Department of Agriculture, National Agricultural LibrarySubjects:BHL Collections:
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By: Ayres, Robert W. (Robert William), - United States. Forest Service.Edition:Publication info: [Washington], Forest Service, U.S. Dept. of Agriculture, 1958Volume: 1958Series:Holding Institution: U.S. Department of Agriculture, National Agricultural LibrarySubjects:BHL Collections: