Besides manganese and iron, they contain nickel, copper, cobalt, lead, molybdenum, cadmium, vanadium, titanium, of which nickel, cobalt and copper are considered to be of economic and strategic importance.
स्वास्थ्य एवं सुरक्षा के विभिन्न पहलुओं पर जानकारी भी सरकार प्रकाशित करती है .pmindia pmindia