RT Journal Article SR Electronic T1 Comparison of drug effects on responding punished by pressurized air or electric shock delivery in squirrel monkeys: pentobarbital, chlordiazepoxide, d-amphetamine and cocaine. JF Journal of Pharmacology and Experimental Therapeutics JO J Pharmacol Exp Ther FD American Society for Pharmacology and Experimental Therapeutics SP 309 OP 315 VO 209 IS 2 A1 Spealman, R D YR 1979 UL http://jpet.aspetjournals.org/content/209/2/309.abstract AB