The Class 1 [over 500, 000 tons] mines constituted 2.9% of the total in both 1937 and 1957, but increased their share of the ... each, consumed almost 70 per cent of the 153 million tons of coal burned by the electric generating plants in that year . ... have been firm guarantees of large quantities of future sales at firm prices, but one of the most informed reporters on the ... See Black Diamond, July 23, 1956.
|Title||:||Economic Redevelopment in Bituminous Coal|
|Author||:||Carroll Lawrence Christenson|
|Publisher||:||Harvard University Press - 1962-01-01|