TY  - BOOK
AU  - Udden,Johan August
TI  - The geology of the Shafter silver mine district, Presidio County, Texas
T2  - University of Texas Mineral Survey. Bulletin
AV  - TN24.T4 A3 no. 8
PY  - 1904///
CY  - Austin
PB  - Von Boeckmann-Jones Company, state printers
KW  - Geology
KW  - Texas
KW  - Silver mines and mining
ER  -