The Geological and Natural History Survey of Minnesota. The sixteenth annual report for the year 1887.

Winchell, N.H.2010-01-062010-01-061888https://hdl.handle.net/11299/56248Summary of the geological and natural history studies carried out in Minnesota during 1887.engeologynatural historyMinnesotalandformsThe Geological and Natural History Survey of Minnesota. The sixteenth annual report for the year 1887.Map