TY - BOOK AU - Switzky, Harvey N. AU - Greenspan, Stephen AU - American Association on Mental Retardation TI - What is mental retardation? : ideas for an evolving disability in the 21st century ET - Rev. and updated ed PB - American Association on Mental Retardation PY - 2006 EP - xxv, 358 p. UR - https://ci.nii.ac.jp/ncid/BD06981985 SN - 0940898942 ER -