www.achp.gov
Architectural Heritage Center / Bosco-Milligan Foundation
www.visitahc.org
City of Hillsboro, Oregon
www.ci.hillsboro.or.us
Downtown by Design: Downtown Hillsboro, Oregon
www.downtownhillsboro.org
Genealogical Society of Washington County, Oregon
www.gswco.org
Greater Hillsboro Area Chamber of Commerce
www.hillchamber.org
Heritage Preservation
www.heritagepreservation.org
Hillsboro 2020 Vision and Action Plan
www.hillsboro2020.org
Hillsboro Downtown Business Association
www.hillsborodowntown.org
Historic American Buildings Survey / Historic American Engineering Record
www.cr.nps.gov/hdp/
memory.loc.gov/ammem/collections/habs_haer/
Historic Preservation League of Oregon
www.hplo.org
League of Historic American Theatres
www.lhat.org
National Main Street Center
www.mainstreet.org
National Register of Historic Places
www.cr.nps.gov/nr/
www.nationalregisterofhistoricplaces.com
National Trust for Historic Preservation
www.nationaltrust.org
National Trust for Historic Preservation Library
www.lib.umd.edu/NTL/ntl.html
Oregon Cultural Heritage Commission
www.ochcom.org
Oregon Heritage Commission
www.oregonheritage.org
Oregon Historic Cemeteries Association
www.oregoncemeteries.org
Oregon Historical Society
www.ohs.org
Oregon Preservation Alliance
www.oregonpreservation.org
Oregon State Historic Preservation Office
www.shpo.state.or.us
Preservation Action
www.preservationaction.org
Preservation Directory
www.preservationdirectory.com
Theatre Historical Society of America
www.historictheatres.org
Washington County Historical Society & Museum
www.washingtoncountymuseum.org
