How about this one? Pai, A. et al. 2010. The Effectiveness of a Case Study-Based 
First-Year Biology Class at a Black Women's College. Journal of College Science 
Teaching. 40(2):32-39. (Sorry, can't figure out how to do italics here.)

Also, I am using TBL at an HBCU. No signs of depression.

Dianne York
Biology Department
Lincoln University
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