United States. Forest Service. (1991). Aerial spraying for gypsy moth control: A handbook of technology (Updated version.). U.S. Dept. of Agriculture, Forest Service : Northeastern Area, Northeastern Forest Experiment Station : Northeast Forest Aerial Application Technology Group.
Chicago Style (17th ed.) CitationUnited States. Forest Service. Aerial Spraying for Gypsy Moth Control: A Handbook of Technology. Updated version. [Washington, D.C.?]: U.S. Dept. of Agriculture, Forest Service : Northeastern Area, Northeastern Forest Experiment Station : Northeast Forest Aerial Application Technology Group, 1991.
MLA (9th ed.) CitationUnited States. Forest Service. Aerial Spraying for Gypsy Moth Control: A Handbook of Technology. Updated version. U.S. Dept. of Agriculture, Forest Service : Northeastern Area, Northeastern Forest Experiment Station : Northeast Forest Aerial Application Technology Group, 1991.