Swift, Hugh. Trekking in Nepal, West Tibet, and Bhutan : the Sierra Club travel guide to the Eastern Himalaya / by Hugh Swift; with additional material by Charles Gay ... [et al.]. - San Francisco : Sierra Club Books, 1989. - xix, 360 p. : ill., maps. ISBN: 0871566508 LCCN: 90035131 Subjects--Topical Terms: Hiking--Nepal.Hiking--China--Tibet.Hiking--Bhutan. Subjects--Geographic Terms: Nepal--Description and travel.Tibet (China)--Description and travel.Bhutan--Description and travel.