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INDEX
435
Word distribution, New World languages, problem in, 293
World quarters, four, 201
Yakima Valley, intermediate culture in Columbia Basin, 260
Yokes, stone, Mexico, 121
Yuman peoples, 212; stock, grouped under Hokan, 285, 369; stock, 381; stock, linguistic and tribal grouping, 378
Zero, discovery and use in mathematics by the Maya, 130
Zume, Tupi god, 199