ECOLOGICAL STUDIES ON THE WHEAT APHIDS (APHIDIDAS : HOMOPTERA)

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31052017_0002_0015_001561.pdf (12.74 MB)
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1975
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PUNJAB AGRICULTURAL UNIVERSITY, LUDHIANA
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31052017_0002_0015_001561.pdf
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http://krishikosh.egranth.ac.in/handle/1/5810141990
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