TY  - BOOK
AU  - Mager,Robert Frank
TI  - Preparing instructional objectives
SN  - 082245601X 
PY  - 1975///
CY  - Belmont, Calif.
PB  - Fearon-Pitman Publishers
KW  - Programmed instruction
N1  - First ed. published in 1961 under title: Preparing objectives for programmed instruction
ER  -