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Hanft, Marshall, The Cape Forts: Guardians of the Columbia, Oregon Historical Society Press, Portland OR, 1973, 2nd reprint, 2003, ISBN 0-87595-044-2
Hanft, Marshall, The Cape Forts: Guardians of the Columbia, Oregon Historical Society Press, Portland OR, 1973, 2nd reprint, 2003, ISBN 0-87595-044-2