Callahan, J. E., & Wanek, A. A. (1969). Geologic reconnaissance of possible powersites at Tyee, Eagle, and Spur Mountain Lakes, southeastern Alaska: A description of the geological factors which could affect the feasibility of three powersites on the mainland of southeastern Alaska, northeast of Ketchikan. United States Department of the Interior, Geological Survey.
Chicago Style (17th ed.) CitationCallahan, James E., and Alexander A. Wanek. Geologic Reconnaissance of Possible Powersites at Tyee, Eagle, and Spur Mountain Lakes, Southeastern Alaska: A Description of the Geological Factors Which Could Affect the Feasibility of Three Powersites on the Mainland of Southeastern Alaska, Northeast of Ketchikan. [Washington, D.C.]: United States Department of the Interior, Geological Survey, 1969.
MLA (9th ed.) CitationCallahan, James E., and Alexander A. Wanek. Geologic Reconnaissance of Possible Powersites at Tyee, Eagle, and Spur Mountain Lakes, Southeastern Alaska: A Description of the Geological Factors Which Could Affect the Feasibility of Three Powersites on the Mainland of Southeastern Alaska, Northeast of Ketchikan. United States Department of the Interior, Geological Survey, 1969.