Du Bois, E. P., & Siever, R. (1955). Structure of the Shoal Creek limestone and Herrin (no.6) coal in Wayne County, Illinois. State Geological Survey.
Chicago Style (17th ed.) CitationDu Bois, E. P., and Raymond Siever. Structure of the Shoal Creek Limestone and Herrin (no.6) Coal in Wayne County, Illinois. Urbana, Ill: State Geological Survey, 1955.
MLA (9th ed.) CitationDu Bois, E. P., and Raymond Siever. Structure of the Shoal Creek Limestone and Herrin (no.6) Coal in Wayne County, Illinois. State Geological Survey, 1955.
Warning: These citations may not always be 100% accurate.