During the past summer the author made a series of observations, at the request of Prof. S. Calvin, upon the surface deposits of the northern part of the state, the results of which may be worthy of record.
Proceedings of the Iowa Academy of Sciences
©1896 Iowa Academy of Science, Inc.
"Additional Observations on Surface Deposits in Iowa,"
Proceedings of the Iowa Academy of Science, 4(1), 68-72.
Available at: https://scholarworks.uni.edu/pias/vol4/iss1/14