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- catalog contributor b3704539.
- catalog contributor b3704540.
- catalog coverage "Iowa Maps.".
- catalog created "1930.".
- catalog date "1930".
- catalog date "1930.".
- catalog dateCopyrighted "1930.".
- catalog extent "2 charts ;".
- catalog issued "1930".
- catalog issued "1930.".
- catalog language "eng".
- catalog publisher "[Washington, D.C.] : U.S. Geological Survey,".
- catalog spatial "Iowa Maps.".
- catalog spatial "Iowa".
- catalog spatial "No scale given.".
- catalog spatial "a".
- catalog subject "Geology Iowa Charts, diagrams, etc.".
- catalog subject "Stratigraphic correlation Iowa Charts, diagrams, etc.".
- catalog title "Tentative correlation of the named geologic units of Iowa / compiled by M. Grace Wilmarth.".
- catalog type "image".