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
- publisher: Woodstock, Vt.
- creator: Williams, Edward Higginson, 1849-1933
- Keyword: Glacial epoch. Geology Pennsylvania.
- years: 1917.
- pages: x, 101 p. incl. front. (map) illus.
- class: QE576
- download: pdf file
