TY  - BOOK
AU  - Christenson, C L
TI  - Economic redevelopment in bituminous coal: the special case of technological advance in United States coal mines, 1930-1960
U1  - 338.272 21st
PY  - 1962///
CY  - Cambridge
PB  - Harvard University Press
KW  - Bituminous Coal; Bitminous Coal industry
ER  -