Kalra,G D. (1983). Mineral development in Bihar 1979-80 to 1988-89. NCAER.
Chicago Edition CitationKalra,G D. Mineral Development in Bihar 1979-80 to 1988-89. New Delhi: NCAER, 1983.
Cita MLAKalra,G D. Mineral Development in Bihar 1979-80 to 1988-89. NCAER, 1983.
Atenció: Aquestes cites poden no estar 100% correctes.