Series of educational illustrations ; 6.32 a.
United States. Bureau of Plant Industry.
United States. Department of Agriculture.
United States. Office of Cooperative Extension Work. Divsion of Agricultural Instruction.
Washington D.C. :United States Department of Agriculture,1928.
"Division of Agricultural Instruction, Office of Cooperative Extension Work, Extension Service, in cooperation with the Bureau of Plant Industry, United States Department of Agriculture, Washington, D.C."
"Index no. 6.32 a."
NAL: 1.8 Ex892E no. 6.32 a
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