006280000a22001690004500003000900000005001700009110006300026245018100089020001800270264004900288490004000337300000900377041000800386650001500394650001900409700003000428PH-MaWHO20241108112335.0 aWHO Expert Committee on Health Statistics (1968 : Geneva). aStatistics of health services and of their activities : thirteenth report of the WHO Expert Committee on Health Statistics [meeting held in Geneva from 12 to 18 November 1968]. a92-4-120429-X aGeneva : bWorld Health Organization,c1969. a(WHO technical report series ; 429) a36p. aeng aStatistics aHealthservices aWorld Health Organization