Disambiguation evidence for Proto-Northern Athabaskan via surface form

"Proto-Northern Athabaskan"

Triples (1)

Triples where some other subject referred to this entity as "Proto-Northern Athabaskan".

Proto-Southern Athabaskan → differentiatedFrom →
"Proto-Northern Athabaskan"
↳ resolves to Proto-Northern Athabaskan
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