Underground Gasification of Coal: Second Experiment in Preparing a Path Through a Coalbed by Hydraulic Fracturing, Issues 5807-5813
Arden D. Fugate ┬╖ Edward G. King ┬╖ K. K. Kershner ┬╖ John B. Gayle ┬╖ Frederick W. Hoertel ┬╖ Lloyd Harold Banning ┬╖ William W. Weller ┬╖ William H. Eddy ┬╖ Andrew A. Cochran
рдЬрд╛рдиреЗ резрепремрез ┬╖ U.S. Department of the Interior. Bureau of Mines