National Parks Service Ice Age Floods National Geologic Trail – www.nps.gov/iafl
Ice Age Floods Institute – iafi.org
Tualatin Historical Society – www.tualatinhistory.org
Grand Ronde Tribe – grandronde.org
North American Research Group – narg-online.com
Willamette Valley Pleistocene Project – www.willamettevalleypleistocene.com