"Deals with the history of the Alaska boundary question. Much of The Alasko-Canadian frontier (entry 1487) is incorporated in this work, which was sent to members of the United States Senate." -- Lowther, B. J., & Laing, M. (1968). A bibliography of British Columbia: Laying the foundations, 1849-1899. Victoria, BC: University of Victoria, p. 163.<br><br>"Arguments in support of the U.S claims in the Alaska boundary dispute. Also: Die Alaska-Grenze; eine Geschichtliche, politische und Staatsrechtliche abhandlung. Alleinberechtigte deutsche Ausgabe von Erwin Volckmann. Mit 6 Karten. Würzburg, Gebrüder Memminger, Verlags-buchhandlung, 1922." -- Edwards, M. H., Lort, J. C. R., & Carmichael, W. J. (1975). A bibliography of British Columbia: Years of growth, 1900-1950. Victoria, BC: University of Victoria, p. 14.