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- [1] Effect of various additives on solvent extraction of coals. ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY, 1999, 218 : U607 - U607
- [2] EFFECT OF WEATHERING ON SOLVENT-EXTRACTION OF COALS ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY, 1987, 193 : 26 - FUEL
- [4] Solvent extraction of Pakistan coals. (III) Extraction and characterization of the extracts by spectroscopic techniques Fuel Sci Technol Int, 8 (973-990):