TY  - BOOK
AU  - Hartley, Harry J.,
TI  - Sttalegles for programmed instructionali and educational technology
AV  - LB1028.5 H36
PY  - 1972///
CY  - London
PB  - Butterworths
KW  - Enseñanza programada
KW  - Educación
KW  - Instruccion programada
ER  -