87 books
Annual Report for with Accompanying Papers (Volume 1)
Reports, with Accompanying Papers (Volume 22)
Reports, with Accompanying Papers (Volume 16)
Reports, with Accompanying Papers Volume 13
Report on the Geological Survey of the State of Iowa, to the Thirteenth General Assembly, January, 1870 (Volume 2); PT. I. County and Regional Geology
First and Second Annual Report of Progress by the State Geologist and the Assistant and Chemist on the Geological Survey of the State of Iowa, Together with the Substance of Popular Letters Contributed to the Newspapers of the State During the Years 1866
Reports and Papers (Volume 16)
Reports, with Accompanying Papers (Volume 3)
Annual Report, Volume 17...
Annual Report, Volume 16...
Annual Report, Volume 24...
First and Second Annual Report of Progress by the State Geologist and the Assistant and Chemist on the Geological Survey of the State of Iowa
Report on the Geological Survey of the State of Iowa (Volume 12); Embracing the Results of Investigations Made During Portions of the Years
First and Second Annual Report of Progress by the State Geologist and the Assistant and Chemist on T
Report on the Geological Survey of the State of Iowa