TY  - BOOK
AU  - R.J. Mandle & A.L. Kontis.
TI  - Simulation Of Regional Ground-Water Flow In The Cambrian-Ordovician Aquifer System In The Northern Midwest, United States
PY  - 0000///[date of publication not identified]
CY  - US Govt. Printing Off.
N1  - US Geological Survey
ER  -