Publication Information

Guidebook Series
1992-05-01 
GB-15 
Environmental geology of the Big Spring groundwater basin, northeast Iowa, R. D. Libra, G. R. Hallberg, R. D. Rowden, E. A. Bettis III, S. J. Kalkcoff, and D. G. Baker, 1992, 51 p., 26 figs., 4 tables. 
Clayton County Ordovician Guidebooks 
Clayton 
$2.00 
$1.50 

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