Erskine, C. F. (1973). Landslides in the vicinity of the Fort Randall Reservoir, South Dakota: A study of some fundamental causes of landslides in the Pierre Shale along the Missouri River trench. United States Government Printing Office.
Chicago Style (17th ed.) CitationErskine, Christopher F. Landslides in the Vicinity of the Fort Randall Reservoir, South Dakota: A Study of Some Fundamental Causes of Landslides in the Pierre Shale Along the Missouri River Trench. Washington: United States Government Printing Office, 1973.
MLA (9th ed.) CitationErskine, Christopher F. Landslides in the Vicinity of the Fort Randall Reservoir, South Dakota: A Study of Some Fundamental Causes of Landslides in the Pierre Shale Along the Missouri River Trench. United States Government Printing Office, 1973.