TY  - BOOK
AU  - Bjerstedt,A.(Ake),1930-
TI  - Educational technology: instructional programming and didakometry 
SN  - 0471076600
PY  - 1972///
CY  - New York
PB  - Wiley-Interscience
KW  - Educational technology
N1  - Bibliography: p. 264-270
ER  -