| Ref. No. | Title |
|---|---|
| 7 | Echinoderms: present and past. Proceedings of the European colloquim on echinoderms, Brussels, 3-8 September 1979. |
| 912 | Echinoderms: present and past. Proceedings of the European colloquim on echinoderms, Brussels, 3-8 September 1979. |
| 61816 | Echinoderms: present and past. Proceedings of the European colloquim on echinoderms, Brussels, 3-8 September 1979. |