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Report on the Geological Survey of the State of Iowa
其他書名
To the Thirteenth General Assembly, January, 1870, Containing Results of Examinations and Observations Made Within the Years 1866, 1867, 1868, and 1869
出版Printed and Pub. by Mills, 1870
URLhttp://books.google.com.hk/books?id=q4o4AQAAMAAJ&hl=&source=gbs_api
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