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- [33] Recent geological phenomena in the "Telluride quadrangle" of the U. S. Geological Survey in Colorado. With special reference to the report of Messrs. Cross and Purington upon that area. TRANSACTIONS OF THE AMERICAN INSTITUTE OF MINING AND METALLURGICAL ENGINEERS, 1901, 31 : 558 - 567
- [35] Annual report of the director, U. S. coast and geodetic survey to the secretary of commerce for the year 1921 PETERMANNS MITTEILUNGEN, 1923, 69 (7-8): : 192 - 192
- [36] Report 1896/97 U. S. Coast and Geodetic Survey, pt 1-2 PETERMANNS MITTEILUNGEN, 1900, 46 (12): : A63 - A63