Williams, T. E. (2004). Soil Survey of Alpena County, Michigan. Natural Resources Conservation Service.
Chicago Style (17th ed.) CitationWilliams, Thomas E. Soil Survey of Alpena County, Michigan. [Washington, D.C.]: Natural Resources Conservation Service, 2004.
MLA (9th ed.) CitationWilliams, Thomas E. Soil Survey of Alpena County, Michigan. Natural Resources Conservation Service, 2004.
Warning: These citations may not always be 100% accurate.