India. Singh, H.N. (1964). Geology of the Simla Hills; Guide to Excursion A-1 of International Geological Congress, XXII Session. New Delhi, 17pp. Geological Survey of India.
India. Singh, H.N. (1964). Geology of the Simla Hills; Guide to Excursion A-1 of International Geological Congress, XXII Session. New Delhi, 17pp + inserted map. Paperback with stapled binding with...