The Geological and Natural History Survey of Minnesota. The second annual report for the year 1873.

Winchell, N.H.Peckham, S.F.2010-01-062010-01-061873https://hdl.handle.net/11299/56230Summary of geological studies in Minnesota for the year 1873engeologynatural historyMinnesotatopographyThe Geological and Natural History Survey of Minnesota. The second annual report for the year 1873.Map