TY  - BOOK
AU  - De Cecco,John P.
TI  - Educational technology; readings in programmed instruction
AV  - LB1028.5 .D35
U1  - 371.3944082 
PY  - 1964///]
CY  - New York
PB  - Holt, Rinehart and Winston
KW  - Educational technology
N1  - Includes bibliographies
ER  -