006420000a22001690004500003000900000005001700009110007200026245017100098020001800269264004900287490004000336300000900376041000800385650002900393650002000422700003000442PH-MaWHO20241108112342.0 aWHO Expert Committee on Vector Biology and Control (1981 : Geneva). aBiological control of vectors of diseases : sixth report of the WHO Expert Committee on Vector Biology and Control [meeting held in Geneva from 1 to 7 December 1981]. a92-4-120679-9 aGeneva : bWorld Health Organization,c1982. a(WHO technical report series ; 679) a39p. aeng aPest control, Biological aDisease vectors aWorld Health Organization