RT Journal Article SR Electronic T1 Geographical Distribution of Disease JF British Journal of Preventive & Social Medicine JO Br J Prev Soc Med FD BMJ Publishing Group Ltd SP 204 OP 210 DO 10.1136/jech.13.4.204 VO 13 IS 4 A1 G. Melvyn Howe YR 1959 UL http://jech.bmj.com/content/13/4/204.abstract AB