Palaeocene of India : limits and subdivisions : invited papers to a symposium held at Birbal Sahni Institute of Palaeobotany, Lucknow, 14-16 November 1986 / sponsors, Birbal Sahni Institute of Palaeobotany, Lucknow, Oil & Natural Gas Commission, Dehradun, Council of Science & Technology, U.P., Lucknow ; [editor, Hari K. Maheshwari].