Tyler, Stephen R. Publication year: 2006 Pages: 420 p. Publisher Intermediate Technology Publications, Inc. Practical Action Publishing, The Schumacher Centre for Technology & Development, Bourton on Dunsmore, Rugby, Warwickshire CV23 9QZ, United Kingdom; Tel +44 (0)1926 634501; Fax +44 (0)1926 634502 Rugby https://www.itdgpublishing.org.uk/ Publisher reference: Intermediate Technology Development Group