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Selected thrusting percussion products. Stone specimen ID, as it appears on Table 2: A, 2; B, 4; C, 11; D, 12; E, 25; F, 20; G (two pieces), 23; H, 17; I, 28; J, 29; K, 14; L, 27; M, 13. (Photograph by Gerald Newlands, Department of Archaeology, University of Calgary.)
