TY  - BOOK
T1  - Lead isotope guides for Mississippi Valley lead-zinc exploration,
DA  - 1969.
CY  - Washington,
AU  - Cannon, Ralph S.
VL  - 1312-G
CN  - QE75
CN  - QE75
PB  - U.S.Govt.Print.Off.,
PP  - Washington,
PY  - 1969.
ID  - 122526
KW  - Lead.
KW  - Lead
KW  - Lead industry and trade
TI  - Lead isotope guides for Mississippi Valley lead-zinc exploration,
ER  -