TY  - RPRT
TI  - Propoxyphene dependence: an update.
AU  - G B Collins
AU  - K S Kiefer
PY  - 1981
DO  - 10.1080/00325481.1981.11715930
UR  - https://pubmed.ncbi.nlm.nih.gov/7312731/
ID  - 7312731
ER  -