Results: 1 - 4 of 4
Dec 31, 1990
Open File Report
… In general, from a coal resource/exploration point of view, the map … examined. Additional coal exploration and coal quality data … mapping and mechanical exploration programs are required …
Dec 31, 1990
Open File Report
… of the map area a reasonable exploration database exists and … examined from a coal resource/exploration point of view. …
Dec 31, 1990
Open File Report
… In general, from a coal resource/exploration point of view, the map … examined. Additional coal exploration and coal quality data …
Dec 31, 1955
Earth Sciences Report
… and other professionals in their exploration and development of the …