Rhif cytundeb Cyngor Cefn Gwlad Cymru = CCW contract no: FC 73-013-95.
Pen Llyn a'r Sarnau cSAC and adjacent areas salt marshes : review and national vegetation classification survey 2003 : main report by M. V. Prosser. Published by Countryside Council for Wales in 2004. Publication and catalogue information, links to buy online and reader comments.