00289nam a2200109 a 450000500170000008200130001710000060003011000520003624500220008826000410011030000280015120251203090723.0  a577bWOR  d_  aWorld Commission on environment and development  aOur common future  aDelhibOxford University Pressc1987  axviii, 383p, 23 cm.bHB