"mager, robert f. "
preparing instructional objectives: / robert.f. mager - 2 ed. - usa : pitman 1975. - ", 146p.; 21 cm."
0-8224-5601-x
LB1028 / .M34 1962
preparing instructional objectives: / robert.f. mager - 2 ed. - usa : pitman 1975. - ", 146p.; 21 cm."
0-8224-5601-x
LB1028 / .M34 1962