REINFORCEMENT OF BEHAVIOR BY MORPHINE INJECTIONS**Supported by U.S. Public Health Service Research Grants DA 01505, DA 00499, MH 07658 and MH 02094 with facilities and services furnished in part by the New England Regional Primate Research Center, Harvard Medical School, Southborough, Massachusetts (U.S. Public Health Service Grant RR 00168, Division of Research Resources, National Institutes of Health). We wish to thank Drs. W.H. Morse, R.T. Kelleher and R.D. Spealman for helpful comments about the manuscript.
1955 ◽
Vol 47
(11)
◽
pp. 1073-1078
1963 ◽
Vol 41
(2)
◽
pp. 81-90
◽
1971 ◽
pp. 83-102
◽
1965 ◽
pp. 383-392
◽
1972 ◽
pp. 3-22
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