00497nam a2200169 a 450000500170000002000150001708200170003210000350004924500590008426000350014330000200017863000120019863000420021063000290025263000240028163000220030520251203110140.0  a185383498X  a333.715bBEL  aBell, Simon and Morse, Stephen  aSustainability indicators measureing the immeasurable?  aLoNew DelhionbEarthscanc1999  axv,175p.c23 cm  aEcology  aSustainable development -- Evaluation  aEnvironmental indicators  aEconomic indicators  aSocial indicators