Methods of testing chemicals on insects

Methods of testing chemicals on insects/ Harold H . Shepard.. -- 6th ed.. -- Minneapolis: Burgess Publishing Company, 1960
248p.; 20cm.
1. Sâu hại cây trồng -- Kiểm soát. 2. Thuốc trừ sâu.

Dewey Class no. : 632.95 -- dc 21
Call no. : 632.95 S547




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