TY  - BOOK
AU  - Mager,Robert F.
TI  - Preparing instructional objectives
SN  - 0822443413
PY  - 1984///
CY  - Belmont, Calif.
PB  - Pitman Learning Inc.
KW  - Programmed instruction
N1  - First ed. published in 1961 under title: Preparing objectives for Programmed instruction
ER  -