Oregon State Historic Preservation Office
http://www.shpo.state.or.us/index.php

Oregon Historical Society
http://www.ohs.org/

National Register of Historic Places
http://www.nationalregisterofhistoricplaces.com/welcome.html

Laws applying to Cultural Resource Management
http://www.cr.nps.gov/linklaws.htm

Federal Historic Preservation Tax Incentives
http://www2.cr.nps.gov/tps/tax/index.htm

Rehab Yes/No Learning Program
http://www2.cr.nps.gov/rehabyes-no/index.htm

Portland Maps
http://www.portlandmaps.com/index.cfm