| Title | A model of the evolution of the main Chelicerate groups |
| Year of Publication | 1978 |
| Authors | Grasshoff, M |
| Book Title | Arachnology: Seventh International Congress. Symposia of the Zoological Society of London |
| Volume | 42 |
| Pagination | 273-284 |
| Publisher | Academic Press |
| City | London |