Epidemiology.
Gordis, Leon,
Epidemiology. - 4th ed. - Philadelphia : Elsevier/Saunders, 2009. - xv, 375 p. ill. 26 cm.
Includes bibliographical references and index.
9781416040026
Epidemiology.
Epidemiology.
Epidemiologic Methods.
WA 105 GE 2009
Epidemiology. - 4th ed. - Philadelphia : Elsevier/Saunders, 2009. - xv, 375 p. ill. 26 cm.
Includes bibliographical references and index.
9781416040026
Epidemiology.
Epidemiology.
Epidemiologic Methods.
WA 105 GE 2009