Foster E. Grossnickle & William Metzner.
The Use of visual aids in the teaching of arithmetic. (The Rambler audio-visual teaching series. Edited by Emil Greenberg & David J. Goodman)
R684747. The Use of visual aids in the teaching of arithmetic. By Foster E. Grossnickle & William Metzner. (The Rambler audio-visual teaching series. Edited by Emil Greenberg & David J. Goodman) © 17Mar50; A42366. Magazine Management Company, Inc. (PWH); 29Dec77; R684747.
Magazine Management Company, Inc.|PWH