University of Illinois Urbana-Champaign

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Showing 811–840 of 4,140 items
Thumbnail for Sand and gravel resources of Macon County, Illinois
Sand and gravel resources of Macon County, Illinois
Hester, Norman C.; Anderson, Richard C.

Thumbnail for Possible recovery of coal from waste at Illinois mines
Possible recovery of coal from waste at Illinois mines
Smith, Cloyde Moffett; Mitchell, David Ray