Published: Apr 1992
| ||Format||Pages||Price|| |
|PDF (416K)||10||$25||  ADD TO CART|
|Complete Source PDF (2.1M)||68||$55||  ADD TO CART|
COAL has often been described as one of the most difficult materials to sample because of its heterogeneity. It is the end product of a sequence of biologic and geologic processes, the complexity of which should at least be appreciated whenever coal is appraised for a specific use.