Note 21 — III A CENTURY OF GEOLOGY.—STEPS OF PROGRESS IN THE INTERPRETATION OF LAND FORMS
Reading edition
Hubbard, O. P., On the condition of trap dikes in New Hampshire an evidence and measure of erosion, this Journal, 9, 158–171, 1850.
Reading edition
Hubbard, O. P., On the condition of trap dikes in New Hampshire an evidence and measure of erosion, this Journal, 9, 158–171, 1850.