00765nac a22002171u 4500 87005173 0408008776 : 0408008776 : 333.72 T648 1431 1431 Tolba, Mostafa Kamal. Sustainable development : constraints and opportunities / Mostafa Kamal Tolba. London ; Boston : Butterworths, 1987. ix, 221 p. ; 25 cm. Includes index. United Nations Environment Programme. Environmental protection. Environmental policy. BB 333.72T648 1431 1431 0 0 0 0 MAIN MAIN 1ST 2010-09-06 Purchase 5 26 333.72 TOL 000003015 2025-07-15 00:00:00 2020-10-26 BB