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1. Biological control of insects

by Sweetman, Harvey L.

Publisher: Comstock publishing co Inc ; 1936Availability: Items available for loan: College of Agriculture, Vellayani [Call number: 632.96 SWE] (1).

2. Principles of biological Control :in relation of hosts and pests and utilisation in regulation of animal and plant populations

by Sweetman, Harvey .L.

Publisher: W.M.C. Brown & Co. ; 1958Availability: Items available for loan: College of Agriculture, Vellayani [Call number: 632.96 SWE] (1).

3. Principles of biological control:

by Sweetman, Harvey L.

Publisher: Lowa, W M C brown company ; 1958Availability: Items available for loan: College of Agriculture, Vellayani [Call number: 632.96 SWE] (1).

Kerala Agricultural University Central Library
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