Heiss, A. M. (1970). Challenges to graduate shcools. Jossey-Bass.
Tohutoru Kātū Chicago (17th ed.)Heiss, Ann M. Challenges to Graduate Shcools. Sanfrancisco: Jossey-Bass, 1970.
Tohutoro MLA (9th ed.)Heiss, Ann M. Challenges to Graduate Shcools. Jossey-Bass, 1970.
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