TY  - BOOK
AU  - Lesher,C.E.
TI  - Coal in 1918. Part A. Production
T2  - Mineral Resources of the United States, 1918-Part II
U1  - 553.2 
PY  - 1920///
CY  - Washington, D.C.
PB  - Government Printing Office
KW  - MINERIA
KW  - CARBON
KW  - PRODUCCION DE CARBON
N1  - Impreso
ER  -