Note 99:1 — III
Reading edition
See Willis, "Northern Appalachians," in "Physiography of the U. S." in National Geog. Soc. "Monographs" (N. Y., 1895), no. 6.
Reading edition
See Willis, "Northern Appalachians," in "Physiography of the U. S." in National Geog. Soc. "Monographs" (N. Y., 1895), no. 6.