فهرس المقالات Cobalt nitrate حرية الوصول المقاله صفحة الملخص نص كامل 1 - Synthesis, Identification and Calculation of Complex Crystallographic Structure of Cobalt (II) with theLigand Heterocyclic Derived from Pyridine Mohammad Mahdi Akbarzadeh Khirollah Mehrani Shahriar Ghammamy Vahideh Hadigheh Rezvan