TY  - RPRT
TI  - PSRO--quality control? Or gimmickry?
AU  - L E Bellin
PY  - 1974
DO  - 10.1097/00005650-197412000-00004
UR  - https://pubmed.ncbi.nlm.nih.gov/4612260/
ID  - 4612260
ER  -