Reprint from Journal of National Cancer Institute (series). 273. Preliminary report of Conference on Geographical Pathology and Demography of Cancer held by Council for Co-Ordination of International Congresses of Medical Sciences under auspices of World Health Organization (WHO) and United Nations Educational. Scientific, and Cultural Organitation (UNESCO), sessions held at Regent's Park College, Oxford, England July 28-Aug. 4, 1950.