Later, as an experienced linguist, he published some studies of Penutian languages (1971) and the classification of Athabaskan languages
Augmentation as affixation in Athabaskan languages
Navajo has some accent marks that do not exist anywhere in the world except other Athabaskan languages
," said Reeves, who teaches computer science.
For example, it is well-known that Athabaskan languages
like Navajo have elaborate sets of argument-classifying verbs, based on detailed semantic categories, but also that throughout North America there are many languages with 'sit', 'stand', 'lie' oppositions obligatory in locative descriptions (Watkins 1976; Mithun 1999: 106-117).
In Athabaskan Language
Studies: Essays in Honor of Robert PK Young, Eloise Jelinek, Sally Midgette, Keren Rice, and Leslie Saxon (eds.