TY  - RPRT
TI  - The schizophrenias: operational definitions.
AU  - A D Forrest
AU  - A J Hay
PY  - 1973
DO  - 10.1111/j.2044-8341.1973.tb02258.x
UR  - https://pubmed.ncbi.nlm.nih.gov/4764280/
ID  - 4764280
ER  -