Clinical epidemiology :
Fletcher, Robert H.
Clinical epidemiology : the essentials / Robert H. Fletcher; Suzanne W. Fletcher; Grant S. Fletcher. - 5th ed. - Philadelphia : Wolters Kluwer/Lippincott Williams & Wilkins Health, 2014. - 253p. : col. ill. ; 26cm
Clinical epidemiology : the essentials / Robert H. Fletcher; Suzanne W. Fletcher; Grant S. Fletcher. - 5th ed. - Philadelphia : Wolters Kluwer/Lippincott Williams & Wilkins Health, 2014. - 253p. : col. ill. ; 26cm