| Publication Type: | Journal Article |
| Year of Publication: | 1987 |
| Authors: | S. D. Cairns, Wells J. W. |
| Journal: | Bulletins of American Paleontology |
| Volume: | 93 |
| Issue: | 328 |
| Pagination: | 23 - 43, pl. 8-11 |
| Date Published: | 1987/// |
| URL: | http://archive.org/details/mobot31753003646335 |