University of Illinois Urbana-Champaign

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Showing 6271–6300 of 6,549 items
Thumbnail for Geology and mineral resources of the Marseilles, Ottawa, and Streator quadrangles,
Geology and mineral resources of the Marseilles, Ottawa, and Streator quadrangles,
Willman, Harold Bowen; Payne, James Norman; Voskuil, Walter Henry

Thumbnail for Metropolitan water supply allocation and operation
Metropolitan water supply allocation and operation
Hey, Donald L.; Gemmell, Robert S.