TY  - RPRT
TI  - Classification of pervasive developmental disorders: some concepts and practical considerations.
AU  - M Rutter
AU  - E Schopler
PY  - 1992
DO  - 10.1007/bf01046322
UR  - https://pubmed.ncbi.nlm.nih.gov/1483971/
ID  - 1483971
ER  -