01. Robert Van Pelt is a research associate in forest ecology at the University of Washington and Evergreen State College. He began the Washington State Big Tree Program in 1987, when he became the state coordinator for the national program. He is the author of Champion Trees of Washington State.

02. https://vancouverislandbigtrees.blogspot.com

03. Washington State Department of Natural Resources (DNR) - source of the aging guide diagram for western red cedars.