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| Author | : | Berthou, P.Y. |
| Year of publication | : | 1973 |
| Title | : | Le Cénomanien de l'Estrémadure portugaise. |
| Journal | : | Memorias dos Serviços Geologicos de Portugal |
| Vol/No/Pages/Plates | : | (n.s.), 23: 164 pp., 67 pls. |
| Published in | : | Lisboa |
References:
Orbitolina cf. concava - pl. 22: 1 = Orbitolina concava concava LAMARCK 1816a
Orbitolina conica d'Archiac - pl. 1: 3 = Conicorbitolina conica ARCHIAC 1837