TY  - RPRT
TI  - The effect of housing and gender on morphine self-administration in rats.
AU  - B K Alexander
AU  - R B Coambs
AU  - P F Hadaway
PY  - 1978
DO  - 10.1007/bf00426903
UR  - https://pubmed.ncbi.nlm.nih.gov/98787/
ID  - 98787
ER  -