title: Sources of increasing agedness of references in psychology-of-learning textbooks, 1952-1995.
abstract: This article identifies sources of a significant increase in the agedness of references in 89 learning textbooks published from 1952 through 1995.
authors.affiliation: Department of Psychology, Cleveland State University, 2399 Euclid Avenue, Cleveland, OH 44115, USA.
authors.forename: S R
authors.initials: SR
authors.lastname: Coleman
mesh_terms: D015706:Bibliometrics; D006801:Humans; D007858:Learning; D011584:Psychology / Q000193:education*; D013782:Textbooks as Topic; D014481:United States