There are 2 matches
| Collection | Authorizer | Collection name | Reference |
|---|---|---|---|
| 122753 | M. Clapham | Chekarda, Sylva River (PIN collection 4987) (= Tshekarda / coll. Novokshonov 1989-2000) Kungurian - Permian 2 - Russian Federation | Aristov (2004) |
| 174628 | M. Clapham | Khalmeryuskoe Field, borehole KhK-231, 152.6 m (PIN collection 1631) Kungurian - Permian 2 - Russian Federation | Aristov (2015) |