31 Busvine, James R. Ludwig, Herbert W. Krynski, Stefan 1973 Biology and control of lice: A. Bionomics of lice. Open discussion Horwitz, Abraham Proceedings of the International Symposium on the control of lice and louse-borne diseases Washington, D.C., U.S.A. Pan American Health Organization 263 169-173 46433 December 4-6, 1972Book, Section