Hupa
Hupa Wikipedia
Hupa native-languages.org
Hupa texts (1904) by Goddard, Pliny Earle, 1869-1928 . Archive.org
The Phonology of the Hupa Language by Goddard, Pliny Earle . Archive.org
The morphology of the Hupa language (1905) by Goddard, Pliny Earle, 1869-1928 . Archive.org