2013 D-236WA 950

Fletcher, Robert H.
Clinical epidemiology : the essentials // Robert H. Fletcher, Suzanne W. Fletcher, Grant S. Fletcher. -- Philadelphia : Wolters Kluwer Health/Lippincott Williams & Wilkins, c2014.
xv, 255 p. : ill.

9781451144475
1451144474


Epidemiologic Methods
WA 950 F612c 2014