TY  - BOOK
AU  - Secor, Edwin S.
CN  - TN825
CN  - TN825
CY  - [Washington ] :
DA  - 1977.
ID  - 9250
KW  - Coal mines and mining
KW  - Bituminous coal
KW  - Strip mining
PB  - Dept. of the Interior, Bureau of Mines,
PP  - [Washington ] :
PY  - 1977.
T1  - Coal recovery from bituminous coal surface mines in the eastern United States :a survey /
TI  - Coal recovery from bituminous coal surface mines in the eastern United States :a survey /
ER  -