These sites may help
http://www.clpgroup.com/NR/exeres/6AD6B12D-7710-45D8-BCA7-98DEA54E3AFE%2CD0CD2BDF-B564-4904-A026-32A42CE38AFB%2Cframeless.htm?ch=%5FMedia%5FRelArc%5F2006%5F&lang=en
http://www.windprospect.com/index.html
http://www.skyscrapercity.com/showthread.php?referrerid=39159&t=319874
http://www.uofaweb.ualberta.ca/chinainstitute/nav03.cfm?nav03=57590&nav02=57589&nav01=57272