title: A major trio.
authors.affiliation: Georgia Institute of Technology, Atlanta, GA 30332-0170, USA. mm27@prism.gatech.edu
authors.forename: M Jackson
authors.initials: MJ
authors.lastname: Marr
mesh_terms: D000046:Academic Medical Centers; D000818:Animals; D001522:Behavior, Animal; D004193:Discrimination Learning; D049673:History, 20th Century; D006801:Humans; D007753:Laboratories; D008404:Massachusetts; D011589:Psychology, Experimental / Q000266:history*; D011678:Punishment; D012054:Reinforcement, Psychology