"mager, robert f. "
Preparing instructional objectives: / Robert.F. Mager - 1 ed. - usa : fearon publishers 1962. - "viii, 60p.; 21 cm."
LB1028.5 / .M2 1975
Preparing instructional objectives: / Robert.F. Mager - 1 ed. - usa : fearon publishers 1962. - "viii, 60p.; 21 cm."
LB1028.5 / .M2 1975