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- [4] THE INCIDENCE OF WEEDS IN WINTER CEREALS IN GREAT-BRITAIN BRIGHTON CROP PROTECTION CONFERENCE - WEEDS 1989, VOLS 1-3, 1989, : 107 - 112
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- [6] 1980 COMMERCIAL FRUIT PEST-CONTROL - WEED, INSECT, AND DISEASE-CONTROL MINNESOTA AGRICULTURAL EXTENSION SERVICE EXTENSION BULLETIN, 1980, (422): : 1 - 20
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