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Clinical epidemiology : the essentials / Robert H. Fletcher, Suzanne W. Fletcher, Edward H. Wagner.
- 616.4 F614 1988
- Fletcher, Robert H.,
- Williams & Wilkins,
- [1988] ©1988
- Baltimore :
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Designing clinical research : an epidemiologic approach / edited by Stephen B. Hulley, Steven R. Cummings with major contributions by Warren S. Browner, Thomas B. Newman, Norman Hearst.
- 610.72 D4576
- Williams & Wilkins, A Waverly Company,
- [1988] ©1988
- Baltimore :