Non-technical obstacles to the use of solar energy: proceedings of the International Symposium, jointly organised by the Commission of the European Communities and the United States' Department of Energy, with the support of the CanadianDepartment of Energy, Mines and Resources, and held in Brussels, May 20-22, 1980 - Strub, A.S. (Albert S.); Steemers, T. C. (European applied research reports and special topics, 1980)