TY - BOOK AU - GUPTA (R R);KUMAR (M);GUPTA (V) TI - Heterocyclic chemistry Vol 1: Principles three and four membered heterocycles SN - 978-81-8128-220-0 U1 - 547.59 GUPH PY - 2013/// CY - New Delhi PB - Springer Verlag KW - Chemistry KW - Organic Chemistry ER -