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  1. Report of a geological survey of Wisconsin, Iowa, and Minnesota : and incidentally of a portion of Nebraska Territory : made under instructions from the United States Treasury Department /
    By: Owen, David Dale, - Leidy, Joseph, - Norwood, Joseph Granville. - Parry, Charles Christopher. - Pratten, Henry. - Shumard, B. F. - Whittlesey, Charles, - United States.
    Publication info: Philadelphia :Lippincott, Grambo & Co.,1852.
    Contributed by: Smithsonian Libraries
    BHL Collections: Smithsonian Libraries
    View Book
  2. Report of a geological survey of Wisconsin, Iowa, and Minnesota; and incidentally of a portion of Nebraska Territory. Made under instructions from the United States Treasury department.
    By: Owen, David Dale, - Leidy, Joseph, - Norwood, J. G. - Parry, C. C. - Pratten, Henry. - Shumard, B. F. - Whittlesey, Charles, - United States.
    Publication info: Philadelphia,Lippincott, Grambo & co.,1852.
    Contributed by: University of Michigan (archive.org)
    View Book