Adaption Processes in public school systems as illustrated by a study of five selected innovations in educat. service in New York, Connecticut, and Massachusetts.

Furkejuvvon:
Bibliográfalaš dieđut
Váldodahkki: Farnsworth, Philo Taylor
Materiálatiipa: Girji
Giella:eaŋgalasgiella
Almmustuhtton: New York 1940
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