23.
The mentally retarded child : a psychological approach
Birkemo, Asbjørn, 1945- (associated name)
Robertson (author)
Robinson, Halbert B. (author)
Omenn, Gilbert S., 1941- (contributor)
Campione, Joseph C. (contributor)
Universitetet i Oslo. Pedagogisk forskningsinstitutt (former owner)
Universitetet i Oslo. Institutt for pedagogikk (owner)
University of Washington (associated name)
University of Illinois (associated name)
McGraw-Hill (publisher)
1976
7D
Universitetet i Oslo