While doing my thesis I also was working on a Chepang Bibliography.

some leftover links to include are:

https://www.reap.insitehome.org/handle/9284745/36889 Unkown resource.

https://reap.sil.org/handle/9284745/74628
Chepang text: Descriptive, Personal Jungle encounters Introduction & set 1

Gurung, Tamang, Thakali, Sherpa, and Chepang prosodies
https://reap.sil.org/handle/9284745/36972

https://reap.sil.org/browse?value=cdm:Chepang&type=language (82 items)

Clause, sentence, and discourse patterns in selected languages of Nepal 4: Word lists
https://reap.sil.org/handle/9284745/8633

Bibliography notes:
https://docs.google.com/document/d/1qGGhWq8Y6DySLfGmIB2Z3HshvCasWfUqp9eq0XpW9qo/edit

https://catalog-test.lib.uchicago.edu/vufind/alphabrowse/home?source=topic&from=Nepa%CC%84la%20bha%CC%84sha%CC%84%20patrika%CC%84.

https://books.google.fr/books?id=bz1BAQAAMAAJ&q=chepang&dq=chepang&hl=en&sa=X&ved=2ahUKEwjCvcvo29_sAhWgA2MBHb8pAdA4FBDoATALegQIBRAC#v=snippet&q=chepang&f=false