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|Extinct||ca. 2000; with the death of Butcher Knight|
historic distribution of Umbugarla
- Hammarström, Harald; Forkel, Robert; Haspelmath, Martin; Bank, Sebastian, eds. (2016). "Umbugarla". Glottolog 2.7. Jena: Max Planck Institute for the Science of Human History.
- Umbugarla at the Australian Indigenous Languages Database, Australian Institute of Aboriginal and Torres Strait Islander Studies
- Bowern, Claire. 2011. "How Many Languages Were Spoken in Australia?", Anggarrgoon: Australian languages on the web, December 23, 2011 (corrected February 6, 2012)
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