Recreational Vehicle Trade Association - http://www.rvia.org
Manufactured Housing - http://www.manufacturedhousing.org
Modular Building Institute - http://www.mbinet.org
Recreational Part Trailers Industry Association - http://rptia.com/contact.html
Vinyl Siding Institute - http://www.vinylsiding.org/
National Mobility Equipment Dealers Association - http://www.nmeda.org
http://mhrahome.org/pages/home.htm
http://www.license.state.tx.us/ihb/ihb.htm
http://www.hud.gov/offices/hsg/sfh/mhs/mhshome.cfm
http://www.nfpa.org/categorylist.asp?categoryID=858&cookie%5Ftest=1