Groves, J. R. (1983). Calcareous foraminifers and algae from the type Morrowan (Lower Pennsylvanian) region of northeastern Oklahoma and northwestern Arkansas. Univ. of Oklahoma.
Chicago-Zitierstil (17. Ausg.)Groves, John R. Calcareous Foraminifers and Algae from the Type Morrowan (Lower Pennsylvanian) Region of Northeastern Oklahoma and Northwestern Arkansas. Norman: Univ. of Oklahoma, 1983.
MLA-Zitierstil (9. Ausg.)Groves, John R. Calcareous Foraminifers and Algae from the Type Morrowan (Lower Pennsylvanian) Region of Northeastern Oklahoma and Northwestern Arkansas. Univ. of Oklahoma, 1983.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.