General Research Books
The Robbins Report, A Report by The Advisory Committee on the National Park Service on Research, Robbins, W.J., E.A. Ackerman, M. Bates, S.A., National Academy of Sciences. 1963
Field Notes of the Metes-and-Bounds Survey of the Revised North Boundary of Crater Lake National Park, (PDF file), by Daniel E. Weller, 1992.