found: Mangaia Island. Living better lives, 2000:t.p. (Mangaia Island)
found: Google, May 16, 22005:www.ck/mangaia (Mangaia, the most southern of Cook Islands; before Captain Cook's arrival the island was called A'Ua'U)
found: Mangaia Island profile, 2003, viewed online June 5, 2017:page 2 (Taata Tangatakino, Mayor of Mangaia; Tuaine Tuara, Island Secretary for Mangaia; Mangaia Island Council) page 5 (Mangaia is the second largest and most southerly of the Cook Islands) page 6 (Local Government functions on the island are conducted by the Island Council and overseen by an Island Secretary. There are 7 locally elected council members as well as the Mayor who is elected by the whole island) - http://www.emci.gov.ck/wp-content/uploads/2014/06/Mangaia-Profile.pdf
found: GEOnet names server, June 5, 2017(Mangaia (approved); variants: Mangaia Island; Mangara; Mangea; island (ISL), Cook Islands (CW); 21°55ʹ30ʺS, 157°55ʹ30ʺW (-21.925, -157.925))
found: Wikipedia, June 5, 2017(Mangaia (traditionally known as A'ua'u Enua) is the most southerly of the Cook Islands and the second largest, after Rarotonga; native name: A'ua'u; 21°55ʹS 157°57ʹW)