005810000a22001810004500003000900000005001700009020001800026110003100044245004800075264004900123300000900172500010400181490003900285041000800324650002300332650001700355650002700372PH-MaWHO20241108112245.0  a92-4-170086-6  aWorld Health Organization.  aMental retardation : meeting the challenge.  aGeneva : bWorld Health Organization,c1985.  a45p.  aPrepared in collaboration with the Joint Commission on International Aspects of Mental Retardation.  a(WHO offset publication ; no. 86).  aeng  aMental retardation  aHealthpolicy  aMental health services