University of Illinois Urbana-Champaign

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Showing 2941–2970 of 22,131 items
Thumbnail for Subsidence resulting from mining
Subsidence resulting from mining
Young, Lewis Emanuel; Stoek, Harry Harkness

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