The United States Department of Agriculture and State Agricultural Experiment Stations are continuing comprehensive planning of research. This report is a part of this joint research planning and was prepared under recommendation 2 (page 204, paragraph 3) of the National Program of Research for Agriculture.
U.S. Department of Agriculture, "A National Program of Research for Bees and Other Pollinating Insects and Insects Affecting Man" (1969). An. Paper 16.