Title
Biological control in crop production : invited papers presented at a symposium held May 18-21, 1980, at the Beltsville Agricultural Research Center (BARC), Beltsville, Maryland 20705 / organized by the BARC Symposium V Committee, George C. Papavizas, Chariman ; sponsored by the Beltsville Agricultural Research Center, Northeastern Region, Science and Education Administration, U.S. Dept. of Agriculture.
Published
Montclair, N.J. : Allanheld, Osmun, 1981.