Geological Survey (U.S.) & ProQuest (Firm). (1898). Atlas to accompany Monograph XXXI on the Geology of the Aspen District Colorado by Josiah Edward Spurr. Samuel Franklin Emmons, geologist in charge. [publisher not identified].
Chicago Style (17th ed.) CitationGeological Survey (U.S.) and ProQuest (Firm). Atlas to Accompany Monograph XXXI on the Geology of the Aspen District Colorado by Josiah Edward Spurr. Samuel Franklin Emmons, Geologist in Charge. Washington: [publisher not identified], 1898.
MLA (9th ed.) CitationGeological Survey (U.S.) and ProQuest (Firm). Atlas to Accompany Monograph XXXI on the Geology of the Aspen District Colorado by Josiah Edward Spurr. Samuel Franklin Emmons, Geologist in Charge. [publisher not identified], 1898.
Warning: These citations may not always be 100% accurate.