Geological Survey (U.S.) & Cannon, W. F. (1996). Bedrock geologic map of the Ashland and the northern part of the Ironwood 30ʹ x 60ʹ quadrangles, Wisconsin and Michigan. The Survey.
Chicago Style (17th ed.) CitationGeological Survey (U.S.) and William F. Cannon. Bedrock Geologic Map of the Ashland and the Northern Part of the Ironwood 30ʹ X 60ʹ Quadrangles, Wisconsin and Michigan. Reston, VA: The Survey, 1996.
MLA (9th ed.) CitationGeological Survey (U.S.) and William F. Cannon. Bedrock Geologic Map of the Ashland and the Northern Part of the Ironwood 30ʹ X 60ʹ Quadrangles, Wisconsin and Michigan. The Survey, 1996.
Warning: These citations may not always be 100% accurate.