(Q39709379)
Statements
1 reference
Enhancement of drug-seeking behavior by environmental stimuli associated with cocaine or morphine injections (English)
2 references
S. R. Goldberg
R. D. Spealman
1 December 1979
1 reference
1 reference
18
1 reference
12
1 reference
1015-1017
1 reference
51
235
Behavior maintained under second-order schedules of intravenous morphine injection in squirrel and rhesus monkeys (English)
Goldberg
1977
28
221
Fixed-interval responding under second-order schedules of food presentation or cocaine injection (English)
Kelleher
1977
Identifiers
1 reference
1 reference