APA (7th ed.) Citation

Schwenner, C. (1991). Soil survey of Houghton County area, Michigan. The Service.

Chicago Style (17th ed.) Citation

Schwenner, Charles. Soil Survey of Houghton County Area, Michigan. [Washington, D.C.]: The Service, 1991.

MLA (9th ed.) Citation

Schwenner, Charles. Soil Survey of Houghton County Area, Michigan. The Service, 1991.

Warning: These citations may not always be 100% accurate.