title: Environmental influences upon drug-induced suppression of operant behavior.
mesh_terms: D000818:Animals; D003216:Conditioning, Operant / Q000187:drug effects*; D003864:Depression, Chemical; D004777:Environment; D008238:Lysergic Acid Diethylamide / Q000494:pharmacology*; D008297:Male; D008635:Mescaline / Q000008:administration & dosage / Q000494:pharmacology*; D051381:Rats; D012055:Reinforcement Schedule
chemical_list: D008238:Lysergic Acid Diethylamide; D008635:Mescaline