Results of spirit leveling in Iowa, 1896 to 1909, inclusive. / R.B. Marshall chief geographer. Work done in cooperation with the state of Iowa from 1907 to 1909, inclusive.

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Main Author: Marshall, R. B. (Robert Bradford), 1867-1949
Corporate Author: Geological Survey (U.S.)
Format: Government Document Book
Language:English
Published: Washington : Govt. Print. Off, 1911.
Series:Bulletin (Geological Survey (U.S.)) ; no. 460.
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