Underground Gasification of Coal: Second Experiment in Preparing a Path Through a Coalbed by Hydraulic Fracturing, Issues 5807-5813
Arden D. Fugate Β· Edward G. King Β· John B. Gayle Β· K. K. Kershner Β· Frederick W. Hoertel Β· Lloyd Harold Banning Β· William H. Eddy Β· William W. Weller Β· Andrew A. Cochran
ΡΠ°Π½. 1961β―Π³. Β· U.S. Department of the Interior. Bureau of Mines