found: Work cat.: Ahiauzu, B. Ka ye su olu Ogba =Let's speak Ogba language, c2003.
found: Ethnologue.com, Jan. 4, 2005(Ogbah: a language of Nigeria; Region: Rivers State, Ogbah-Egbema-Ndoni LGA, northern Niger Delta; alternate names: Ogba; dialects: Egnih, Igburu-Usomini; comments: a separate language in the Igbo language cluster)
found: Alphabetical list of Nigerian languages web site, Aug. 25, 2005(Ogbah)
found: Biebuyck, D. African ethnonyms, 1996(Ogba; variant: Oba; formerly considered a subcategory of Igbo)
found: Linguasphere 1999:entry 98-GAA-db (Ogba; variant: Ogbah; closely related to egi; part of "igboid")
