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Guidebook series - Illinois State Geological Survey.

APA Citation

Illinois State Geological Survey. (19631974). Guidebook series - Illinois State Geological Survey. [Urbana]: Illinois State Geological Survey.

Illinois State Geological Survey. Guidebook Series - Illinois State Geological Survey. [Urbana]: Illinois State Geological Survey, 19631974.

Warning: These citations may not always be complete (especially for serials).