Washington, D.C. : U.S. Dept. of Energy, Assistant Secretary for Fossil Energy, Deputy Assistant Secretary for Oil, Gas, Shale, and Special Technologies ; Springfield, Va. : Available from the National Technical Information Service, 1988-
Microform. [Washington, D.C.], U.S. G.P.O., 1988- microfiches : negative ; 11 x 15 cm.
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