There are 2 matches
| Collection | Authorizer | Collection name | Reference |
|---|---|---|---|
| 144019 | N. Bonuso | Zone 20 - Bird Spring Fm., Arrow Canyon Morrowan - Carboniferous 4 - Nevada | Langenheim et al. (1985) |
| 144020 | N. Bonuso | Zone 21 - Bird Spring Fm., Arrow Canyon Morrowan/Atokan - Carboniferous 4 - Nevada | Langenheim et al. (1985) |