003660000a22001330004500003000900000005001700009100001800026245006600044264004900110300000900159490003200168041000800200650002400208PH-MaWHO20241108112241.01 aAykroyd, W.R. aConquest of deficiency diseases : achievements and prospects. aGeneva : bWorld Health Organization,c1970. a98p. a(FFHC basic study ; no. 24) aeng aDeficiency diseases