TY  - BOOK
AU  - Young,H.L.
TI  - Summary of ground-water hydrology of the Cambrian-Ordovician aquifer system in the northern Midwest, United States
T2  - Regional aquifer-system analysis
AV  - GB1017 .Y68 1991
U1  - 551.49/0977 20
PY  - 1992///
CY  - Washington
PB  - U.S. G.P.O.
KW  - Water, Under ground
KW  - Middle West
KW  - Local
KW  - Geography, Stratigraphic
KW  - Ordovician
KW  - Cambrian
KW  - Aquifers
N1  - Includes bibliographical references
ER  -