TY  - BOOK
AU  - Anna,Lawrence O.
TI  - Geologic framework of the ground-water system in Jurassic and Cretaceous rocks in the northern Great Plains, in parts of Montana, North Dakota, South Dakota, and Wyoming
U1  - 551.7660978 
PY  - 1986///
CY  - Washington, D.C.
PB  - United States Government Printing Office, U.S. Geological Survey
KW  - Geology, Stratigraphic
KW  - Jurassic
KW  - Cretaceous
KW  - Geology
KW  - Great Plains
KW  - Groundwater
N1  - Accompanied by 18 fold. leaves of plates issued in a portfolio; Bibliography: p. B30-B36
ER  -