%A A. Biswas %J Environmental Conservation %T International Seminar on Resource Systems: Theory and Methodology, held at Chung-Ang University, Seoul, South Korea, 29 May-2 June 1979 %N 03 %P 247 %V 6 %D 1979 %I Cambridge Journals %R 10.1017/S0376892900003209 %L iiasa13721