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david h girard
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List of intercepted plant pests, 1967
David H. Girard · U.S. Dept. of Agriculture, Agricultural Research Service
76 sayfa · 1968
Agricultural pests / Plants / Diseases and pests
List of intercepted plant pests, 1968
David H. Girard · U.S. Dept. of Agriculture, Agricultural Research Service
86 sayfa · 1969
Agricultural pests / Plants / Diseases and pests
List of intercepted plant pests, 1969
David H. Girard · U.S. Dept. of Agriculture, Agricultural Research Service
77 sayfa · 1971
Agricultural pests / Plants / Diseases and pests