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| 1 | Title: | Pennsylvania glaciation, first phase: materials for a discussion of the attenuated border of the moraine described in volume Z of the second Geological survey of Pennsylvania | |
| Creator: | Williams, Edward Higginson, 1849-1933 | ||
| Publication: | Woodstock, Vt,1917. | ||
| Call #: | F11JQ W716 | ||
| Extent: | x, 101 p. incl. front. (map) illus. 23 cm. | ||
| Subjects: | Glacial epoch | Geology -- Pennsylvania | ||
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