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2. The color of success;Allen;Harvard Educational Review,1992
3. A backward glance forward: past, present, and future perspectives on historically black colleges and universities;Allen;Review of Higher Education,2002
4. American Association of Colleges and Universities, 2005. Facts & Figures: Surveys Highlight Challenges Posed by Student Transfer. Available: http://www.aacu.org/aacu_news/AACUNews05/December05/facts_figures.cfm (accessed August 31, 2008).
5. American Indian Measures for Success in Higher Education: Fact Book 2005;American Indian Higher Education Consortium,2006