Edema, CU, AE Ogbeibu, and M Utunye. 2008. “Some Aspects Of The Biology Of <i>Papyrocranus Afer</i> And <i>Xenomystus Nigri</I> (Family Notopteridae) In The River Osse, Southern Nigeria”. Tropical Freshwater Biology 16 (2):9-19. https://doi.org/10.4314/tfb.v16i2.20908.