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9421
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9422
Ecological succession and control of insect pests affecting stored seeds of upland crops [microform]
Wydane 1977Visual Material -
9423
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9424
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9425
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9426
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9427
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9428
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9429
Perennial nutsedge (Cyperus rotundus L.) competition with upland rice and its chemical control [microform].
Wydane 1977Visual Material -
9430
The effects of weed control and planting methods on the yield and growth of lowland rice [microform].
Wydane 1977Visual Material