TY  - BOOK
AU  - Mager,Robert F
TI  - Preraring instructional objectives 
SN  - 0-8224-5601-X
AV  -  LB1028.5.M2 
PY  - 1975///
CY  - California.
PB  -  : Inc. Pitman Learning.
KW  -  Programmed instruction
ER  -