Henning, Peter Hemphill., The popular economy an approach to the urban employment problem in developing countries by Peter Hemphill Henning. - Ann Arbor University of Michigan 1976. - 167 pages : illustration ; 21 cm. Thesis (Ph.D.) - University of Michigan, 1976 p. 161-167 Subjects--Topical Terms: Urban economics--Mathematical models. Subjects--Geographic Terms: Kenya--Economic conditions--Mathematical models.