Tolong jelaskan mengenai Sumber luar dari Propinsi Nuristan dalam bahasa sunda

Linguistics and ethnography of Nuristân and neighboring regions, collected and analyzed by Richard F. Strand

Dupree, Nancy Hatch (1977): An Historical Guide to Afghanistan. 1st Edition: 1970. 2nd Edition. Revised and Enlarged. Afghan Tourist Organization. LINK

Richard F. Strand. (1997-present) Richard Strand's Nuristan Site LINK. The most accurate and comprehensive source on Nuristan, by the world's léading scholar on the languages and ethnic groups of Nuristan.

M. Klimburg.   NURISTAN dina Encyclopedia Iranica.  LINK