00391nam a2200085Ia 4500100001900000245009900019260000900118520015900127583001900286  aMALLEY, Jurgen  aMilestones on the road to sustainability : appropriate technology and sustainable development.  c1997  aHighlights the steps which are needed to achieve the combined social, economic and ecological changes that are required to ensure sustainable development.  c3/7/00kM2LMGR