TY  - RPRT
TI  - Variable interval responding maintained by intravenous codeine and ethanol injections in the rhesus monkey.
AU  - J M Carney
AU  - M E Llewellyn
AU  - J H Woods
PY  - 1976
DO  - 10.1016/0091-3057(76)90272-0
UR  - https://pubmed.ncbi.nlm.nih.gov/828270/
ID  - 828270
ER  -