006960000a22001810004500003000900000005001700009110008900026245018700115020001800302264004900320490004000369300000900409041000800418650001700426650002600443650001500469700003000484PH-MaWHO20241108112335.0 aWHO Scientific Group on Biological Components of Human Reproduction (1968 : Geneva). aBiological components of human reproduction : studies of their variations in population groups, report of a WHO scientific group [meeting held in Geneva from 10 to 16 December 1968]. a92-4-120435-4 aGeneva : bWorld Health Organization,c1969. a(WHO technical report series ; 435) a41p. aeng aReproduction aEpidemiologic methods aPopulation aWorld Health Organization