Chronic intravenous drug administration in the pigeon.
D000818:Animals; D002404:Catheterization / Q000295:instrumentation; D010856:Columbidae; D003216:Conditioning, Operant; D004305:Dose-Response Relationship, Drug; D007275:Injections, Intravenous / Q000295:instrumentation*; D008722:Methods; D009020:Morphine / Q000037:antagonists & inhibitors / Q000494:pharmacology; D009270:Naloxone / Q000494:pharmacology; D010600:Pharmacology; D013997:Time Factors
D009270:Naloxone; D009020:Morphine