Jones, B E Drug-seeking behavior in the dog: lack of effect of prior passive dependence on morphine. [electronic resource] - Drug and alcohol dependence Jul 1977 - 287-94 p. digital Publication Type: Journal Article ISSN: 0376-8716 Standard No.: 10.1016/0376-8716(77)90006-0 doi Subjects--Topical Terms: AnimalsBehavior, AnimalConditioning, OperantDogsHumansMorphine--administration & dosageMorphine DependenceReinforcement, Psychology