Note 19 — III A CENTURY OF GEOLOGY.—STEPS OF PROGRESS IN THE INTERPRETATION OF LAND FORMS
Reading edition
Lesley, J. P., Observations on the Appalachian region of southern Virginia, this Journal, 34, review, 413–415, 1862.
Reading edition
Lesley, J. P., Observations on the Appalachian region of southern Virginia, this Journal, 34, review, 413–415, 1862.