GUPTA (R R);KUMAR (M);GUPTA (V) Heterocyclic chemistry Vol 2: five membered heterocycles - New Delhi Springer Verlag 2013 - x,638 PB - 2 . ISBN: 978-81-8128-221-7 Subjects--Topical Terms: ChemistryOrganic Chemistry Dewey Class. No.: 547.59 GUPH