How to spray the aircraft way : a guide for farmers and spray-plane pilots /
United States.Plant Pest Control Division.
United States.Department of Agriculture.
Washington, D.C. : U.S. Dept. of Agriculture,
1960.
Originally issued June 1954.
"The original manuscript of this bulletin was written under contract by the University of Oklahoma Research Institute on the basis of information supplied by USDA's Plant Pest Control Division."
Aerial spraying and dusting in agriculture.