RT Journal Article SR Electronic T1 Lecture Notes in Biomathematics. Vol 81: Mathematical Approaches to Problems in Resource Management and Epidemiology JF Journal of Epidemiology and Community Health JO J Epidemiol Community Health FD BMJ Publishing Group Ltd SP 328 OP 328 DO 10.1136/jech.44.4.328-c VO 44 IS 4 A1 R J Prescott YR 1990 UL http://jech.bmj.com/content/44/4/328.4.abstract AB