How to Cite:
Trowbridge, A. C., (1941) “Forty-Third, Forty-Fourth, Forty-Fifth, Forty-Sixth, Forty-Seventh and Forty-Eighth Annual Reports of the State Geologist”, Iowa Geological Survey Annual Report 37(1), vii-xiv. doi: https://doi.org/10.17077/2160-5270.1278
Rights: Material in the public domain. No restrictions on use.
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