Wind gaps and water gaps of the northern Appalachians
Subtitle: their characteristics and significance
By: by Karl Ver Steeg ...
Series: Contributions from the Department of geology, Columbia university -- v. 42, no. 5, 1930; Contributions from the Dept. of Geology of Columbia University -- v. 42, no. 5, 1930
Published: 1930
Place of publication: New York]
Language: eng
Number of pages: 219
Subjects: Physical geography; Erosion
Notes: Vita.

"Reprinted from the Annals of the New York academy of sciences, vol. XXXII."

Thesis (PH.D.)--Columbia university, 1930.

Bibliography: p. 219.