TY  - GEN
AU  - Callender, Patricia
TI  - Programmed learning:  development and structure
U1  - 371.39 
PY  - 1969///
CY  - London
PB  - Longmans
KW  - Programmed instruction
KW  - Learning
KW  - Evaluation
KW  - Universities and Colleges
KW  - Education
KW  - Harvard University
ER  -