TY  - BOOK
AU  - Moore,Frank B.
AU  - Butler,C.R.
TI  - Pitchblende deposits at the Wood and Calhoun mines, Central City mining district, Gilpin County, Colo.,
T2  - Geological survey circular
AV  - QE75 .C5 no. 186
U1  - 553.49 
PY  - 1952///
CY  - Washington
KW  - Pitchblende
N1  - "References cited": p. 8
ER  -