Mehta, R.N; George, R.M Megaliths at Machad and pazhayannur Talpally taluka, Trichur district, Kerala state: a report of the excavations conducted from 18th April to 12th May 1974 - Baroda, Faculty of Arts M.S Univ. 1978 - 34 4006 ISBN: 16 Dewey Class. No.: 930.10283 / MEH-M