TY  - BOOK
AU  - Bjerstedt, Å. (Åke), 1930-
TI  - Educational Technology: Instructional programming and didakometry 
SN  - 0471076600
U1  - 371.33 B626e 
PY  - 1972///
CY  - New York-London
PB  - Wiley-Interscience (A Division of John Wiley & Sons, Inc.)
KW  - Educational technology
KW  - Programmed learning
ER  -