TY  - BOOK
AU  -  O' Day Edward F., Kulhavy Raymond W.
TI  - Programmed instruction: techniques and trends
U1  - 371.39442 
PY  - 1971///
CY  - New York
PB  - Appleton-Centruy-Corfts
KW  - Teaching Methods
KW  - Programmed Instruction
N2  -  Programmed Instruction, Teaching Methods
ER  -