Canada. National Parks Branch & Williams, M. B. (1921). Through the heart of the Rockies & Selkirks.
Cita Chicago Style (17a ed.)Canada. National Parks Branch y M. B. Williams. Through the Heart of the Rockies & Selkirks. [Ottawa], 1921.
Cita MLA (8a ed.)Canada. National Parks Branch y M. B. Williams. Through the Heart of the Rockies & Selkirks. 1921.
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