Research for small farms proceedings of the special symposium

by Symposium Research for Small Farms 1er. 1981 Beltsville, Maryland, Kerr, Howard W. editor, Knutson, Lloyd editor/a
Published 1982

Biological control of pests by mites proceedings

by Biological control of pests by mites 1st 1982 University of California, Berkeley, Hoy, Marjorie A. editor, Cunningham, Gary L. editor/a, Knutson, Lloyd editor/a
Published 1983