ID:DA16616437
Knapp, Seaman A. (Seaman Ashahel)
Knapp, S. A.
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[S. A. Knapp]
U.S. Department of Agriculture, Office of the Secretary 1910 Circular / United States Department of Agriculture No. 32
United States Department of Agriculture, Bureau of Plant Industry, Farmers' Cooperative Demonstration Work 1908
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