TY  - BOOK
AU  - Downey,Joe S.
AU  - Dinwiddie,George A.
TI  - The regional aquifer system underlying the northern Great Plains in parts of Montana, North Dakota, South Dakota, and Wyoming--summary
U1  - 551.490978 
PY  - 1988///
CY  - Washington
PB  - United States Government Printing Office
KW  - Aquifers
KW  - Great Plains
KW  - Montana
KW  - North Dakota
KW  - South Dakota
KW  - Wyoming
N1  - Three folded leaves of illustrations in pocket; Bibliography: p. 34-64
ER  -