A comparative study of dusting by means of airplane and ground machine for the control of the blueberry maggot
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A comparative study of dusting by means of airplane and ground machine for the control of the blueberry maggot
（Circular / United States Department of Agriculture, no. 123）
United States Department of Agriculture, 1930
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Title and responsibility from caption
"Contribution from Bureau of Entomology."
Includes bibliographical references