Walcott, C. D. (1913). Cambrian formations of the Robertson Peak District, British Colombia and Alberta, Canada. In: Cambrian geology and paleontology. II. Smithsonian Miscellaneous Collections. 57(12): 327-343.
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Walcott, C. D.
1913
Cambrian formations of the Robertson Peak District, British Colombia and Alberta, Canada. In: Cambrian geology and paleontology. II.