Cover image for Cooperation, principles and practices : eleventh yearbook.
Title:
Cooperation, principles and practices : eleventh yearbook.
Author:
National Education Association of the United States. Department of Supervisors and Directors of Instruction.
Publication Information:
Washington, D.C., [publisher not identified], 1938.
Physical Description:
244 pages : illustrations, forms ; 24 cm
Language:
English
Format :
Book