005630000a22001690004500003000900000003000900009005001700018008004100035020001800076040000900094041000800103100002700111245017900138264003100317300001000348650003500358PH-MaWHOPH-MaWHO20241108112213.0231014b        |||||||| |||| 00| 0 eng d  a0-416-40650-5  cWPRO  aeng  aDe Jong J M, Berg J.M.  aProceedings of the Seventh Congress on International Association for the Scientific Study of Mental Deficiency (1985 : New Delhi).bScience and service in mental retardation.  aLondon : bMethuen,c1985.  a475p.  aMental retardationxCongresses