Helmcken, J. S., & Smith, D. B. (1975). The reminiscences of Doctor John Sebastian Helmcken. University of British Columbia Press, in co-operation with the Provincial Archives of British Columbia.
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Chicago-čujuhus (17. p.)
Helmcken, John Sebastian, juo Dorothy Blakey Smith. The Reminiscences of Doctor John Sebastian Helmcken. [Vancouver]: University of British Columbia Press, in co-operation with the Provincial Archives of British Columbia, 1975.
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MLA-čujuhus (9. p.)
Helmcken, John Sebastian, juo Dorothy Blakey Smith. The Reminiscences of Doctor John Sebastian Helmcken. University of British Columbia Press, in co-operation with the Provincial Archives of British Columbia, 1975.
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