 | Market diseases of apples | (1) |
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 | Market diseases of apples, pears, and quinces / by Charles F. Pierson, Michael J. Ceponis, and Lacy P. McColloch, collaborator. Pierson, Charles F., 1920- 4n Washington, D.C. : Agricultural Research Service, U.S. Dept. of Agriculture, 1971. | |
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