Valanis, Barbara Epidemiology in nursing and health care/ Barbara Valanis - 2ea ed. - Norwalk, Conn. : Appleton & Lange, CNo., c1992. - 444p. - C . ISBN: 0-8385-2226-2 Subjects--Topical Terms: Métodos Epidemiológicos Dewey Class. No.: 614.4 / V125e