There are 3 matches
| Collection | Authorizer | Collection name | Reference |
|---|---|---|---|
| 23273 | S. Holland | Sardeson Collection, St. Peter Sandstone Blackriveran - Ordovician 4-5 - Minnesota | Rice and Hedblom (1987) |
| 23274 | S. Holland | Sardeson Collection, Glenwood Formation Blackriveran - Ordovician 4-5 - Minnesota | Rice and Hedblom (1987) |
| 23276 | S. Holland | Sardeson Collection, Platteville Formation Blackriveran/Rocklandian - Ordovician 4-5 - Minnesota | Rice and Hedblom (1987) |