Title: Erosion cycles in the driftless area /
Authors: Powers, William Edwards, 1902-
Year: 1930
Subjects: Powers, William Edwards,; Harvard University Curricula.
Abstract: Paper for Geography 20a, February 5, 1930. Includes two other undated shorter essays, entitled "Peneplanation and isostatic adjustment" and "Base-leveling and isostatic adjustment." These essays seem to be further studies of the topic covered in the original essay.