Geomedical systems : intervention and control / Richard Thomas. Thomas, Richard, 1947- Medical geography. Epidemiology. Disease Outbreaks prevention & control. Epidemiologic Methods. Models, Biological. RA792 .T46 1992 614.42 20 THG Includes bibliographical references (p. 282-304) and index. London ; New York : Routledge, 1992. 1992. 1992 Text xvii, 314 p. : eng Routledge series on geography and environment