 | Commercial growing of asparagus | (3) |
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 | Commercial growing of asparagus / prepared by Crops Research Division and Entomology Research Division, Agricultural Research Service. Washington, D.C. : U.S. Dept. of Agriculture, 1970. | |
| Commercial growing of asparagus / prepared by Crops Research Division and Entomology Research Division, Agricultural Research Service. Washington, D.C. : U.S. Dept. of Agriculture, 1968. | |
| Commercial growing of asparagus / prepared by Plant Science Research Division and Entomology Research Division, Agricultural Research Service. Washington, D.C. : U.S. Dept. of Agriculture, 1971. | |
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