Annual Report Of the State Geologist, 1919-1920, Vol. 29.
Natural Resources, Department of
The constitution of the state of Iowa and amendments from 1857 to 1919 with historical introduction.
Secretary of State, Iowa
1920 Report of the Iowa Library Commission Made to the Governor of Iowa for the Biennial Period July 1, 1918 to June 30, 1920.
Library of Iowa, State