Hydrogeology of the Cambrian-Ordovician aquifer system in the northern midwest, United States.  by H.L. Young.  with a section on ground-water quality by D.I. Siegel
Contributors: Siegel, D.I.
Publisher: Dept. of the Interior
Place of publication: Washington
Language: eng
Number of pages: 99
Subjects: Water, Underground - Middle West; Aquifers - Middle West
Notes: 11