Results of spirit leveling in Minnesota, 1897 to 1914, inclusive / R.B. Marshall, chief geographer; work done in cooperation with the state of Minnesota from 1909 to 1914, inclusive; George A. Ralph, chief engineer of State Drainage Commission.
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TextSeries: United States. Bulletin ; 560.Publication details: Washington, Govt. Print. Off., 1915.Description: 190 p. : pl. ; 24 cmSubject(s): LOC classification: - QE75 .B9 no. 560
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