na INLIS000000000002861 20231116105738 0010-061600000002860 231116 0 eng 0-333-16564-0 614.4 Ald i Alderson, Michael An Introduction to Epidemiology / Michael Alderson London : The Macmillan Press, 1977. Epidemiology 614.4 Ald a ix, 228 p, ; 23 cm.