Title: Screening tests for materials to increase the effectiveness of a DDT-Pyrethrum formula
Description: <a href="uf.jsp?st=UF005557548&ix=pm&I=0&V=D&pm=1" rel="nofollow">uf.jsp?st=UF005557548&ix=pm&I=0&V=D&pm=1</a>
Subjects: Insecticides--Testing, DDT (Insecticide, Pyrethrum (Insecticide, Insecticides, DDT.