scholarly journals Direct liquefaction of low-rank coals. Annual technical report, April 1, 1987--March 31, 1988 including quarterly technical progress report, January--March 1988: Task 5.1

1988 ◽  
Author(s):  
J.R. Rindt ◽  
M.D. Hetland ◽  
C.L. Knudson ◽  
W.G. Willson
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