Cooperation

Cooperation

Cooperation : principles and practices / The Department of supervisors and Directors of Instruction of the National Education Association. eleventh yearbook. -- Washington, D.C. : Department of Supervisors and Directors of Instruction of the National Education Association, 1938. -- 244 s.
I. National Education Association of the United States. Dept. of Supervisors and Directors of Instruction


školství * americké školství
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