| Author(s) | Petrunkevitch, A. |
| Year | 1945a |
| Title | Palaeozoic Arachnida. An inquiry into their evolutionary trends |
| Publisher | Scientific Papers, Illinois State Museum |
| Volume | 3 |
| Issue | 2 |
| Series | |
| Pages | 1–76 |
| DOI | |
| Zoobank LSID | urn:lsid:zoobank.org:pub:37BC2306-46B5-4295-B133-095A860CE90E |
| Comment |