Advisory Council: http://www.achp.gov
American Cultural Resources Association: http://www.acra-crm.org
American Institute of Architects: http://www.aia.org
American Institute for Conservation of Historic and Artistic Works: http://aic.stanford.edu
The Foundation Center: http://www.foundationcenter.org
Government Printing Office (Federal Register notices): http://www.access.gpo.gov
Historic American Buildings Survey/Historic American Engineering Record (HABS/HAER): http://lcweb2.loc.gov/ammem/hhhtml
Library of Congress (current bills and reports): http://thomas.loc.gov
Michigan Land Use Institute: http://www.mlui.org
National Alliance of Preservation Commissions: http://www.uga.edu/napc
National Archives: http://www.archives.gov/index.html
National Association of Tribal Historic Preservation Officers: http://www.nathpo.org
National Center for Preservation Technology and Training: http://www.ncpott.nps.gov
National Conference of State Historic Preservation Officers: http://www.ncshpo.org
National Conference of State Legislatures Database: http://www.ncsl.org/programs/arts/statehist_intro.htm
National Park Service Cultural Programs: http://www.cr.nps.gov/whatwedo.htm
National Park Service Route 66 Travel Itinerary: http://www.nps.gov/history/nr/travel/route66/
National Transportation Enhancements Clearinghouse: http://www.enhancements.org
National Trust for Historic Preservation: http://www.nthp.org
Preservation Action: http://www.preservationaction.org
Recent Past Preservation Network: http://www.recentpast.org/index.html
Reconnecting America: http://www.reconnectingamerica.org
Renewal Alliance: http://www.senate.gov/~santorum/real/real.html
Resources and Research Tools: http://www.preservationdirectory.com
Scenic America: http://www.scenic.org
Smart Growth America: http://www.smartgrowthamerica.org
Smart Growth Online: http://www.webmaster@smarthgrowth.org
Society for American Archeology: http://www.saa.org
Society for Commercial Archeology: http://www.sca-roadside.org
Society for Preservation of Long Island Antiquities: http://www.splia.org
Sprawl Watch Clearinghouse: http://www.sprawlwatch.org
Surface Transportation Policy Project: http://www.istea.org