The great ice age in Pennsylvania Lewis, Henry Carvill 1853-1888 creator text pau Philadelphia? Franklin Institute? 1883] 1883 monographic eng
print
21 p., [1] folded leaf of plates : map ; 24 cm. by H. Carvill Lewis. Cover title. "Abstract of a lecture, delivered at the Franklin Institute, January 5, 1883." "Reprinted from the Journal of the Franklin Institute, April, 1883." n-us-pa Geology Pennsylvania Glacial epoch Pennsylvania QE697 .L61 ca 06002473 DLC 900716 20260227111043.0 ca 06002473