Fiedler, O.G.H.; Du Toit, R.; Kluge, E.B.; Alexander, R.A.; Clark, R.; Louw, J.G.; De Kock, V.E.
(Published by The Government Printer, Pretoria, 1954)
During the course of the tsetse fly eradication campaign in northern Zululand,
where the new contact insecticides D.D.T. and benzene hexachloride (B.H.C.)
have been used on an extensive scale for the first time in the ...