FishBase References for Witkowski, A., J. Blachuta, B.
Kokurewicz and M. Kowalewski, 1989

Ref. No.	Title
75612	Changes of gonadosomatic intex (GSI) and egg diameter in the grayling Thymallus thymallus (L.) in annual cycle.

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FishBase References for Witkowski, A., J. Blachuta, B.Kokurewicz and M. Kowalewski, 1989