TY  - BOOK
AU  - Medaris,L.G.
TI  - Early proterozoic geology of the Great Lakes region
PY  - 1983///
CY  - Boulder, Colo.
PB  - Geological Society of America
KW  - Geology, Stratigraphic
KW  - Precambrian
KW  - Addresses, essays, lectures
KW  - Geology
KW  - Great Lakes Region
N1  - Includes bibliographies
ER  -