niloticus l. (pisces: cichlidae) in lake tana, ethiopia - African Journals ...

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Elizabeth Kebede, Zinabu G/Mariam and Ahlgren, I.. (1994). ... Nagelkerlce, L.A.J., Mina, M.V., Tesfaye Wudneh, Sibbing, EA. and Osse,. J.W.M. (l995a). In Lake ...