Promotion and training aspects of integrated surveys proceedings of the fifth International Seminar, 4-7 Mar. 1971 - ITC-UNESCO Seminar on Promotion and Training Aspects of Integrated Surveys Dehra Dun) 1971; Nossin, J.J.; ITC-UNESCO Center for Integrated Surveys (Enschede ITC-UNESCO Centre for Integrated Surveys, 1971)
Keywords: Economic surveys -- Congresses; Economic development -- Congresses; Natural resources -- Research -- Congresses