FRACTIONATION OF COAL LIQUIDS BY HPLC WITH STRUCTURAL CHARACTERIZATION BY LC-MS.DARK WA.1977; AMER. CHEM. SOC., DIV. PETROLEUM CHEM. PREPR.; U.S.A.; DA. 1977; VOL. 22; NO 3; PP. 1126-1141Article

SHALE OIL SEPARATION BY HPLCDARK WA.1982; SYMPOSIUM ON INSTRUMENTATION AND CONTROL FOR FOSSIL PROCESSES/1982-06-07/ARGONNE IL; USA; DA. 1982; PP. 291Conference Paper

FOSSIL FUEL ANALYSIS BY LIQUID CHROMATOGRAPHY.DARK WA.1975; AMER. LAB.; U.S.A.; DA. 1975; VOL. 7; NO 8; PP. 50-55 (5P.)Article

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DESIGN AND APPLICATIONS OF A HIGH TEMPERATURE ALC/GPC.LIMPERT RJ; NELSON JR; DARK WA et al.1978; AMER. LAB.; USA; DA. 1978; VOL. 10; NO 7; PP. 43-49; (5 P.)Article

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FRACTIONATION OF COAL LIQUIDS BY HPLC WITH STRUCTURAL CHARACTERIZATION BY LC-MS.DARK WA; BRADFORD DL; MCFADDEN WH et al.1977; J. CHROMATOGR. SCI.; U.S.A.; DA. 1977; VOL. 15; NO 10; PP. 454-460; BIBL. 7 REF.Article