1. Beckham Stephen Dow.2006. “Oregon's Coast Reservation: Tribal Distribution Administration and the Particular History of Federal Relations of the Confederated Tribes of Coos Lower Umpqua and Siuslaw.” A report prepared for the Confederated Tribes of Coos Lower Umpqua and Siuslaw Indians (CTCLUSI) on file at CTCLCUSI Tribal Historic Preservation Office Coos Bay Oregon.
2. Beckham Stephen Dow.2009. “Oregon Coast Treaty 1855: A History of the Failure of ‘Utmost Good Faith’.” A report prepared for the Confederated Tribes of Coos Lower Umpqua and Siuslaw Indians (CTCLUSI) on file at CTCLCUSI Tribal Historic Preservation Office Coos Bay Oregon.
3. Butler Virginia.2021. “Luther Cressman (1897–1994).” Oregon Encyclopedia. Oregon Historical Society. Last Modified March 11 2021.https://www.oregonencyclopedia.org/articles/cressman_luther_1897_1994_/#.YE94HZ1KiiN.