TY  - RPRT
TI  - Visual testing with 'preferential looking' in mentally retarded children.
AU  - G Lennerstrand
AU  - A Axelsson
AU  - G Andersson
PY  - 1983
DO  - 10.1016/0166-4328(83)90165-1
UR  - https://pubmed.ncbi.nlm.nih.gov/6639726/
ID  - 6639726
ER  -