Regional economic planning : techniques of analysis for less developed areas : papers and proceedings of the first study conference on problems of economic development organised by the European Pruductivity Agency... / Edited by Walter Isard [and] John H. Cumberland. Conference on Regional Economic Development (1st :, 1960 : Bellagio, Italy) Isard, Walter. Cumberland, John H. Organisation for European Economic Co-operation. European Productivy Agency. Regional planning Congresses. Economic policy Congresses. HD82 C5747 309.2 ISR Includes bibliographies. Paris : European Productivity Agency of the Organisation for European Economic Co-operation, 1961 1961 1961 Text 450 p. : fre