Teaching by correspondence:

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Bibliographic Details
Main Author: Erdos, Renée F.
Format: Book
Language:English
Published: London, Paris, Longmans; Unesco, 1967.
Series:Unesco source books on curricula and methods, no. 3.
Subjects:
Description
Physical Description:iii-xvii, 218 p. illus. (incl. forms.) maps, facsims., tables, diagrs. 23 cm.
Bibliography:Bibliography: p. 213-214.