Organizations
American Iron and Steel Institute
1140 Connecticut Ave. NW, Ste. 705
Washington DC 20036
(202) 452-7100
http://www.steel.org

Portland Cement Association
5420 Old Orchard Rd.
Skokie IL 60077
(847) 966-6200
(847) 966-8389 fax
http://www.cement.org
http://www.cement.org/homes
info@cement.org

Insulating Concrete Form Association
P.O. Box 3470
Crofton MD 21114
(888) 864-4232
(410) 451-8343 fax
http://www.forms.org

Field Museum of Natural History
1400 S. Lake Shore Dr.
Chicago IL 60605
(312) 922-9410
http://www.fieldmuseum.org  
(has authentic replica of Pawnee earth lodge inside; also books)

Asset-Based Community Development Institute
School of Education and Social Policy
Annenberg Hall, Room 148
Northwestern University
2120 Campus Drive
Evanston IL 60208
(847) 491-8711
http://www.abcdinstitute.org/

Institute for Community Economics
1101 30th St., NW, Suite 400
Washington DC 20007
(202) 333-8931 X135
http://www.iceclt.org/clt

The E.F. Schumacher Society
140 Jug End Rd.
Great Barrington MA 01230
(413) 528-1737
http://www.smallisbeautiful.org/clts.html

National Association of Housing Co-operatives
1441 I St. NW, Suite 700
Washington DC 20005-6542
(202) 737-0797
http://www.coophousing.org