Texas Historical Commission:  http://www.thc.state.tx.us

Advisory Council on Historic Preservation:  http://www.achp.gov

National Park Service: http://www.nps.gov/

National Trust for Historic Preservation:  http://www.preservationnation.org/

Preservation Action:  http://www.preservationaction.org

Archaeological Conservancy:  http://www.americanarcheology.com

Preservation Texas, Inc.: http://www.preservationtexas.org/

Texas State Historical Association: http://www.tshaonline.org/

Texas Association of Museums: http://www.io.com/~tam/

Smithsonian: http://www.si.edu/

The Library of Congress - "Caring For Your Collection": http://www.loc.gov/preserv/careothr.html