The Geological and Natural History Survey of Minnesota. The eighteenth annual report for the year 1889.

Winchell, N.H.2010-01-072010-01-071890https://hdl.handle.net/11299/56259Summary of the geological and natural history studies carried out in Minnesota during 1889.engeologynatural historyMinnesotalandformsThe Geological and Natural History Survey of Minnesota. The eighteenth annual report for the year 1889.Map