Hamburg, M D Retrograde amnesia produced by intraperitoneal injection of physostigmine. [electronic resource] - Science (New York, N.Y.) May 1967 - 973-4 p. digital Publication Type: Journal Article ISSN: 0036-8075 Standard No.: 10.1126/science.156.3777.973 doi Subjects--Topical Terms: Amnesia--chemically inducedAnimalsAvoidance Learning--drug effectsBehavior, AnimalHumansIsoflurophatePhysostigmineRats