Singh, Nongthombam Geetmani Organo and nano catalysed approach towards the synthesis of oxygen and nitrogen heterocycles - Shillong Department of Chemistry, NEHU 2016 - xiii,231p.:ill.,table.;28cm. Abstract Subjects--Topical Terms: Oxygen heterocycles-ResearchNitrogen heterocycles-Research Dewey Class. No.: 547.592045 / SIN