National Geographic : 1946 Aug
00 C.Suydam Cutting ,Tibetans and Yaks, Partners of the High Places, Plow for Barley in a 13,000-foot Valley The thick-coated yak is a cousin of the American bison. Tibetans eat the yak's flesh, milk, and butter. They makeitshide into ropes, tents, and boats, and export its tail to India as a fly whisk. It surprises them that other countries can get along without their indispensable pack carrier.