by United States.: Bureau of Entomology and Plant Quarantine
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Dependence of agriculture on the beekeep...
Preliminary tests of synthetic organic c...
Conversion tables and equivalents for us...
Controlling grasshoppers in alfalfa with...
Preliminary tests of plant materials as ...
Percentage tables for numbers from 1 to ...
Cholinesterase-inhibiting pesticide toxi...
Effects of Sevin-4-Oil, Dimilin, and Ort...
Field evaluation of chemical compounds f...
A pilot project with Orthene for control...