INTERNATIONAL symposium on pyrethrum: the natural in Pyrethrum: the natural insecticide / sponsored by The Minnesota University, Minnesota, August 1972.; edited by John E.Casida - secticidNew York Academic press 1973 - xvii, 329 p. Includes index. ISBN: 121629503 Subjects--Topical Terms: Insecticide PyrethrumNatural pesticide Dewey Class. No.: 632.9517 / INT