TY  - BOOK
AU  - Macdonald, Ray.
AU  - Smith, Robert L.
AU  - Thomas, John E.
CN  - QE75
CN  - QE462.O28
CN  - QE75
CY  - [Reston, Va.?] :
CY  - Denver, CO :
DA  - 1992.
ID  - 144923
KW  - Obsidian
N1  - Shipping list no.: 93-0033-P.
PB  - U.S. Dept. of the Interior, U.S. Geological Survey ;
PB  - For sale by Books and Open-File Sales,
PP  - [Reston, Va.?] :
PP  - Denver, CO :
PY  - 1992.
T1  - Chemistry of the subalkalic silicic obsidians /
TI  - Chemistry of the subalkalic silicic obsidians /
VL  - 1523
ER  -