TY  - DATA
AU  - Humphries,Marc
ED  - Library of Congress.
TI  - The U.S. coal industry: historical trends and recent developments 
T2  - Report / Congressional Research Service
PY  - 2018///-
CY  - [Washington, D.C.]
PB  - Congressional Research Service
KW  - Coal trade
KW  - United States
KW  - Coal
KW  - Coal mines and mining
N1  - The CRS report home page provides access to all versions published since 2018 in accordance with P.L. 115-141; CRDP Program record; Report includes bibliographical references
UR  - https://purl.fdlp.gov/GPO/gpo114241
ER  -