TY  - BOOK
AU  - Averitt,Paul
TI  - Coal resources of the United States: (a progress report, October 1, 1953)
T2  - Geological Survey circular 293
AV  - QE75 .C5 no. 293
PY  - 1953///
CY  - Washington
KW  - Coal
KW  - United States
N1  - Bibliography: p.47-49
ER  -