| Citation | Witkowski, A., J. Blachuta, B. Kokurewicz and M. Kowalewski, 1989, Changes of gonadosomatic intex (GSI) and egg diameter in the grayling Thymallus thymallus (L.) in annual cycle.. Acta Ichthyol. Pisc. 19(2):21-28. |
| Ref. | 75612 Witkowski, A., J. Blachuta, B. Kokurewicz and M. Kowalewski, 1989 |
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| Named Used as Valid | Thymallus thymallus |
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