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- [9] HYDROGENATION OF COAL-TAR OIL TO MIDDLE DISTILLATES INDIAN JOURNAL OF TECHNOLOGY, 1984, 22 (01): : 20 - 24
- [10] INFRARED IDENTIFICATION OF ASPHALTIC AND COAL-TAR PITCHES JOURNAL OF THE OIL & COLOUR CHEMISTS ASSOCIATION, 1974, 57 (01): : 44 - 47