TY  - JOUR
AU  - William J. Kruvant
AU  - Carlisle E. Moody
AU  - Jr.
AU  - Patrick L. Valentine
PY  - 1982/07//
TI  - Sources of Productivity Decline in U.S. Coal Mining, 1972-1977
JO  - The Energy Journal
VL  - Volume 3
DO  - 10.5547/ISSN0195-6574-EJ-Vol3-No3-4
IS  - 3
KW  - Coaling mining
KW  - US
KW  - Productivity decline
SN  - 1944-9089
UR  - http://www.iaee.org/en/publications/ejarticle.aspx?id=1558