TY - BOOK AU - Sing Y.K. AU - Y.K. Singh, M. H. Siddiqui TI - Encyclopaedia of teaching (St of 11 Vlumes:): Teching of Chemistry (volume II) SN - 9.4788131316e+013 U1 - 31 23 PY - 2012/// CY - New Delhi PB - APH Publshing corporation ER -