found: The pioneers, 1991:t.p. verso (Osun State government) introd. (Osun State created 8/27/1991)
found: Africa south of the Sahara, 1992:Nigeria section (Osun State, created from part of Oyo State); 1993: Nigeria section (Osun State; capital: Oshogbo)
found: GEOnet, May 5, 2009(Osun [short form] State--ADM1, 07°30ʹN 04°30ʹE; PPL Osun also listed)
found: Col. gaz. of the world, May 5, 2009(Osun, state, SW Nigeria; carved out of Oyo state in 1991; also spelled Oshun)
found: GeoNames, algorithmically matched, 2009(adm1; 07°30ʹ00ʺN 004°30ʹ00ʺE)