Geological Survey (U.S.) & ProQuest (Firm). (1909). [Geological Survey bulletin 411; Results of spirit leveling in Ohio, 1898-1908]. [publisher not identified].
Chicago Style (17th ed.) CitationGeological Survey (U.S.) and ProQuest (Firm). [Geological Survey Bulletin 411; Results of Spirit Leveling in Ohio, 1898-1908]. Washington: [publisher not identified], 1909.
MLA (9th ed.) CitationGeological Survey (U.S.) and ProQuest (Firm). [Geological Survey Bulletin 411; Results of Spirit Leveling in Ohio, 1898-1908]. [publisher not identified], 1909.
Warning: These citations may not always be 100% accurate.