Glaciers and Glaciation, Vol. 3 (Classic Reprint)

Excerpt from Glaciers and Glaciation, Vol. 3

Acknowledgments are due the Canadian International Boundary Commission, the United States Biological Sur vey, and, especially, the United States Geological Survey, for the use of photographs and other illustrative material. The editor wishes also to express his appreciation of the drawings prepared for this volume by Mr. W. E. Spader and Mrs. Louise M. Keeler. The frontispiece, plate x1, and a large number of the text figures are by Mr. Spader, while all of the chapter headings are by Mrs. Keeler.

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