| Title | Estudio de Frenelopsis oligostomata (Romariz) Alvin, procedente del Cretacico superior de Torrelaguna (Madrid) |
| Publication Type | Journal Article |
| Year of Publication | 1981 |
| Authors | Alvarez-Ramis, C |
| Journal | Estudios Geologicos |
| Volume | 37 |
| Pagination | 83–87 |
| ISSN | 0367-0449 |
