Wallace, Tina Bornstein, Lisa Chapman, Jennifer Publication year: 2006 Pages: 199 p. Publisher ITDG Publishing 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 http://practicalaction.org/ Publisher reference: ITDG Publishing