005910000a22001690004500003000900000005001700009110006300026245014400089020001800233264004900251490004000300300000900340041000800349650001400357650002000371700003000391PH-MaWHO20241108112333.0 aWHO Expert Committee on Health Statistics (1967 : Geneva). aMorbidity statistics : twelfth report of the WHO Expert Committee on Health Statistics [meeting held in Geneva from 7 to 13 November 1967]. a92-4-120389-7 aGeneva : bWorld Health Organization,c1968. a(WHO technical report series ; 389) a29p. aeng aMorbidity aData collection aWorld Health Organization