TY  - BOOK
AU  - Bjerstedt, Ake,
TI  - Educational technology: instructional programming and didakometry 
SN  - 0471076600
AV  - LB1028.3 B54
PY  - 1972///
CY  - New York
PB  - Wiley-Interscience
KW  - Tecnología educativa
ER  -