| Publication Type: | Journal Article |
| Year of Publication: | 1980 |
| Authors: | J. R. Thomasson |
| Journal: | Iowa State Journal of Research |
| Volume: | 54 |
| Pagination: | 301-317 |
| Keywords: | CR REF, FOSSILS, Review |
| Alternate Journal: | Iowa State Journal of Research |
| Publication Type: | Journal Article |
| Year of Publication: | 1980 |
| Authors: | J. R. Thomasson |
| Journal: | Iowa State Journal of Research |
| Volume: | 54 |
| Pagination: | 301-317 |
| Keywords: | CR REF, FOSSILS, Review |
| Alternate Journal: | Iowa State Journal of Research |