00305nam a2200097Ia 450000500170000000800410001702000180005808200190007624500670009526000450016220250107154542.0241216s9999||||xx |||||||||||||| ||und||  a1-85533-088-7  a330.917 24 PEA 0aSustainable development economics and environment in the world  aLondonbEarhscan publications ltd,c1990