Proceedings of the 5th Underground Coal Conversion Symposium, Alexandria, Virginia, June 18-21, 1979 [Microfiche] / sponsored by the U. S. Department of Energy, Division of Fossil Fuel Extraction ; [Richard H. Hertzberg, symposium chairman ; coordinated by Booz, Allen & Hamilton Inc.

Saved in:
Hertzberg, R.
Washington, Springfield, Va. : Dept. of Energy], 1979.
available through the National Technical Information Service,
ix, 449 p.
in situ gasification : conference united states