008760000a22002410004500 PH-MaWHO 20241108112339.0 WHO Expert Committee on Insecticides (1974 : Geneva). 657223 Ecology and control of vectors in public health : twenty-first report of the WHO Expert Committee on Insecticides [meeting held in Geneva from 7 to 11 October 1974]. 92-4-120561-X Geneva : World Health Organization, 1975. (WHO technical report series ; 561) 35p. WHO/HQ File eng Insect control 202108 Disease vectors 136635 Insecticides 202213 Pest control, Biological 270280 World Health Organization 657224 http://whqlibdoc.who.int/trs/WHO_TRS_561.pdf MONO 8168 8168 0 0 0 0 WPRO WPRO 2021-05-23 0 WHO/HQ File 08168 2024-01-24 00:00:00 2021-05-23 MONO