The third volume deals with the most important engineering and economic questions of Soviet town planning. In the section "The Town Planning Economy" chief attention is paid to problems of utilizing manpower resources, to methods applied for the selection of territory, for the determination of building height, and for the reconstruction of towns. Being based on wide experience gained in the USSR the section "Site preparation" classifies methods of engineering works, gives examples of such works and suggests appropriate recommendations. The section "Water Supply, Sewerage and Sanitary Purification" considers modern systems of supplying towns with water, of sewage disposal, and of atmosphere and water purification. In the section dedicated to "Power Supply" one sees modern schemes of electric-heat-gas supply, recommendations concerning their selection, the section, as well, deals with the question of possible influence of new kinds of power resources and new methods of power generation on town planning. The last section - "Industrialization of Town Building" - presents materials defining the history and the tendencies of industrialization of building and gives exemplary schemes of its organization. In all the sections great attention is being paid to the progressive techniques of engineering equipment. The achievements of Soviet town planning in the field of engineering equipment is illustrated by photos, diagrams and drawings. The book is intended for architects, engineers, economists and other specialists working in the field of town planning. It will be read with interest by foreign readers as well.