Narayanan, P. I. A., & Subrahmanyan, N. N. (1959). Beneficiation of low grade manganese ores of India. Council of Scientific & Industrial Research.
Chicago-viite (17. p.)Narayanan, P. I. A., ja N. N. Subrahmanyan. Beneficiation of Low Grade Manganese Ores of India. New Delhi: Council of Scientific & Industrial Research, 1959.
MLA-viite (8. p.)Narayanan, P. I. A., ja N. N. Subrahmanyan. Beneficiation of Low Grade Manganese Ores of India. Council of Scientific & Industrial Research, 1959.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.