TY  - BOOK
AU  - Imlay,Ralph W.
TI  - Twin Creek limestone (Jurassic) in the western interior of the United States,
T2  - Geological Survey professional paper 540
AV  - QE75 .P9 no. 540
PY  - 1967///
CY  - Washington
PB  - U.S. Govt. Print. Off.
KW  - Geology
KW  - West (U.S.)
KW  - Geology, Stratigraphic
KW  - Jurassic
KW  - Paleontology
N1  - Bibliography: p. 99-102
ER  -