Hammer-Stones.

McGuire, J. D. American Anthropologist, vol. 4, pp. 301 ff. 1891.

Jenney, W. P. American Anthropologist, vol. 4, p. 317. 1891.

Smith, W. G. “Man the Primeval Savage,” p. 121. 1894.

Mercer, H. C. The Archæologist, vol. 2, p. 276. 1894.

Beauchamp, W. M. The Archæologist, vol. 2, p. 318. 1894.

Snyder, J. F. The Archæologist, vol. 2, p. 378. 1894.

Remsburg, G. J. The Archæologist, vol. 3, p. 175. 1895.

Williams, F. H. American Archæologist, 1898, p. 87. 1898.

Mason, O. T. American Anthropologist, vol. 11, p. 382. Alaska and Hawaii. 1898.