PSI, the Keller plan handbook : essays on personalized system of instruction /

PSI, the Keller plan handbook : essays on personalized system of instruction /

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Bibliographic Details
Main Authors: Keller, Fred Simmons, 1899-, Sherman, J. Gilmour
Format:
Published: Menlo Park, California : W A Benjamin, 1974
Subjects:
Individualized instruction

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