Human Settlements Programme, IIED.Publication year: 2008Source publication informationJournal Title: Environment and UrbanisationVolume: Vol. 20 No. 2 Pages: pp 307-613PublisherSageIIED, 3 Endlseigh Street, London WC1H ODD, UKLondonwww.iied.org/eandu or eau.sagepub.com Publisher reference: Sage Publications