Kolata, D. R., & Graese, A. M. (1983). Lithostratigraphy and depositional environments of the Maquoketa Group (Ordovician) in northern Illinois. Illinois State Geol. Survey.
Chicago Style (17th ed.) CitationKolata, Dennis R., and Anne M. Graese. Lithostratigraphy and Depositional Environments of the Maquoketa Group (Ordovician) in Northern Illinois. Champaign, IL: Illinois State Geol. Survey, 1983.
MLA (9th ed.) CitationKolata, Dennis R., and Anne M. Graese. Lithostratigraphy and Depositional Environments of the Maquoketa Group (Ordovician) in Northern Illinois. Illinois State Geol. Survey, 1983.
Warning: These citations may not always be 100% accurate.