شرکت های کل سنگ
آهن شرکت ملی استخراج سنگ معدن itakpe، دولت kogi سرنا Track Record – ITB 5 YEARS SELECTED PUBLICATIONS FROM OPM GROUP (20102014) From 2010 – 2014 our group has been actively conducted research in OPM field and contributed in academic through publications in both national and international journal