APA (7th ed.) Citation

Geological Survey (U.S.) & Sims, P. K. (1990). Geologic map of Precambrian rocks of Iron Mountain and Escanaba 1?x 2?quadrangles, northeastern Wisconsin and northwestern Michigan. The Survey.

Chicago Style (17th ed.) Citation

Geological Survey (U.S.) and P. K. Sims. Geologic Map of Precambrian Rocks of Iron Mountain and Escanaba 1?x 2?quadrangles, Northeastern Wisconsin and Northwestern Michigan. Reston, Va.: The Survey, 1990.

MLA (9th ed.) Citation

Geological Survey (U.S.) and P. K. Sims. Geologic Map of Precambrian Rocks of Iron Mountain and Escanaba 1?x 2?quadrangles, Northeastern Wisconsin and Northwestern Michigan. The Survey, 1990.