PSI, Keller's personalized system of instruction
Subtitle: an appraisal
By: by Bruce A. Ryan.
Publisher: American Psychological Association
Published: 1974
Place of publication: Washington
Language: eng
Number of pages: 30
Subjects: Keller, Fred Simmons, 1899-; Individualized instruction.
Other titles: Personalized system of instruction.
Notes: Running title: Personalized system of instruction. *** Bibliography: p. 23-30

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