1. Chemistry of Coal Utilization;Karr,1963
2. Oils and basic organic chemicals from coal by hydrogenation;Herman,1972
3. Technoeconomic feasibility of production of oil from coal in Upper Assam;Lahiri,1972
4. Recovery of phenols from coal tars;Bhaduri,1972
5. Extraction and hydrotreatment of phenolics from coal hydrogenation;Tiwari;Indian J. Technol.,1978