Rai, Nirjala Yak Habitat and Mountain Pastoralism in Sikkim Himalaya Ph.D Dr. Uttam Lal - Gangtok: Sikkim Unversity, 2022. - 308p. - Department of Geography . English Subjects--Topical Terms: Yak Habitat.Mountain Pastoralism.Sikkim Himalaya. Dewey Class. No.: 910.54167091143 / RAI/Y