Negi, S. S. (1983). Contributions to Himalayan ecology. Bishen Singh Mahendra Pal Singh and Indian Journal of Forestry.
Citace podle Chicago (17th ed.)Negi, Sharad Singh. Contributions to Himalayan Ecology. Dehra Dun, India: Bishen Singh Mahendra Pal Singh and Indian Journal of Forestry, 1983.
Citace podle MLA (8th ed.)Negi, Sharad Singh. Contributions to Himalayan Ecology. Bishen Singh Mahendra Pal Singh and Indian Journal of Forestry, 1983.
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