Contract no. 73-02-95A.
Field trials of the POD - an acoustic data logger - to monitor harbour porpoise activity in Newport Bay, Pembrokeshire : a report to the Countryside Council for Wales and the Wildlilfe Trusts by Chris Pierpoint. Published by Cyngor Cefn Gwlad Cymru in 1999. Publication and catalogue information, links to buy online and reader comments.