Results: 1 - 4 of 4
Dec 31, 1990
Open File Report
… exploration and coal quality data needs to be collected … be excluded. Based on existing data, potential surface-mineable … the remaining map area, little data is available and the coal …
Dec 31, 1990
Open File Report
… of view. Additional coal quality data needs to be collected and … the remaining map area, little data is available and the coal …
Dec 31, 1990
Open File Report
… exploration and coal quality data needs to be collected … the remaining map area, little data is available and the coal …
Dec 31, 1970
Open File Report
… of the routine processing of data for the Central Data File consists of the sending …