O'Brien, N. P. (1989). Strengthening Elementary and Secondary Curriculum and Textbook Resources at the University of Illinois at Urbana-Champaign Education and Social Science Library To Improve National Access. Final Report.
Chicago-Zitierstil (17. Ausg.)O'Brien, Nancy Patricia. Strengthening Elementary and Secondary Curriculum and Textbook Resources at the University of Illinois at Urbana-Champaign Education and Social Science Library To Improve National Access. Final Report. 1989.
MLA-Zitierstil (9. Ausg.)O'Brien, Nancy Patricia. Strengthening Elementary and Secondary Curriculum and Textbook Resources at the University of Illinois at Urbana-Champaign Education and Social Science Library To Improve National Access. Final Report. 1989.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.