Among the dedicated was John E. Gordon, a retiring professor of epidemiology at Harvard's School of Public Health. In 1949, Gordon had turned his academic inquiries to population growth and was convinced that the same methodology applied to epidemiology studies could be used to examine population problems. In 1951, Clarence funded an exploratory visit by Gordon to the Punjab state of India. The resulting India-Harvard-Ludhiana or Khanna study examined the use of contraceptives by Indians in that region and continued for 17 years, generating some three dozen articles, a book, and a monograph.