TY  - BOOK
AU  - Hunter,John Frederick
TI  - Pre-Cambrian rocks of Gunnison river, Colorado,
T2  - U.S. Geological survey.  Bulletin 777
AV  - QE75 .B9 no. 777
PY  - 1925///
CY  - Washington
PB  - Govt. print. off.
KW  - Geology
KW  - Colorado
KW  - Gunnison River Valley
KW  - Geology, Stratigraphic
KW  - Precambrian
N1  - At head of title: Department of the interior; Issued also as thesis (Ph. D.) Johns Hopkins university, 1912; Plates printed on both sides
ER  -