實物特徵
出版:Vol. 1, no. 1 (Feb. 1966)-v. 21, no. 4 (Dec. 1986)
Item Description:Official journal of the Division on Mental Retardation, the Council for Exceptional Children, NEA.
實物描述:21 v. : ports. ; 26 cm.
Available on microfilm from University Microfilms International.
出版頻率:Four no. a year
ISSN:0013-1237
1042-9859