There are 2 matches
| Collection | Authorizer | Collection name | Reference |
|---|---|---|---|
| 23796 | S. Holland | Sardeson Collection, Guttenberg Formation, Illinois and Iowa Rocklandian/Kirkfieldian - Ordovician 4-5 - Illinois, Iowa | Catalani (1987) |
| 23797 | S. Holland | Sardeson Collection, Ion Formation, Buckhorn Member, Illinois and Iowa Kirkfieldian - Ordovician 4-5 - Illinois, Iowa | Catalani (1987) |