Awdur
Bracken, Dorothy Kendall
2
Bridges, Clara Jo
2
Ellis, Donald K.
2
Halley, Mildred E.
2
Hauge, Robert C.
2
Hays, Jimmye Dobbs
2
International Teaching Tapes (Firm)
2
Science Research Associates
2
Greenberg, Robert, 1954-
1
Individualized Instruction Incorporated
1
Jinnah, Mahomed Ali, 1876-1948
1
Teaching Company
1