This source preferred by Eileen Wilkes and Timothy Darvill

Authors: Markey, M., Wilkes, E.M. and Darvill, T.

http://www.archaeology.co.uk/index.php?option=com_flippingbook&Itemid=57&book_id=195

Journal: Current Archaeology

Volume: 181

Pages: 7-11

ISSN: 0011-3212