Negi, S. S. (1983). Contributions to Himalayan ecology. Bishen Singh Mahendra Pal Singh and Indian Journal of Forestry.
Lua i Stíl Chicago (17ú heag.)Negi, Sharad Singh. Contributions to Himalayan Ecology. Dehra Dun, India: Bishen Singh Mahendra Pal Singh and Indian Journal of Forestry, 1983.
Lua MLA (8ú heag.)Negi, Sharad Singh. Contributions to Himalayan Ecology. Bishen Singh Mahendra Pal Singh and Indian Journal of Forestry, 1983.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.