TY  - BOOK
AU  - Callender,Patricia
TI  - Programmed learning: ITS  Development AND  Structure
SN  - 0582410428
AV  - LB 1028.5 .C26 1969
U1  - 371.39/44 
PY  - 1969///
CY  - Harlow
PB  - Longmans
KW  - Programmed instruction
N1  - Bibliography: p. [115]-117
ER  -