TY  - BOOK
T1  - National coal resource assessment methodologycomparison of resource calculation methods by two geographic information systems (GIS) /
DA  - 1998.
CY  - [Reston, Va.?] :
AU  - Tewalt, Susan J.
VL  - 98-365
CN  - I 19.76:
PB  - U.S. Dept. of the Interior, U.S. Geological Survey,
PP  - [Reston, Va.?] :
PY  - 1998.
N1  - Cover title.
N1  - Shipping list no.: 99-0518-M.
ID  - 218611
KW  - Coal reserves
KW  - Geographic information systems.
TI  - National coal resource assessment methodologycomparison of resource calculation methods by two geographic information systems (GIS) /
ER  -