Fletcher, Robert H.
Clinical epidemiology : the essentials // Robert H. Fletcher, Suzanne W. Fletcher, Edward H. Wagner. -- Baltimore : Williams & Wilkins, c1996.
ix, 276 p. : ill.
0683032690
Epidemiologic Methods
Clinical epidemiology : the essentials // Robert H. Fletcher, Suzanne W. Fletcher, Edward H. Wagner. -- Baltimore : Williams & Wilkins, c1996.
ix, 276 p. : ill.
0683032690
Epidemiologic Methods