3 books
The Usage of the Intertidal Mudflats at the Rhymney, Cardiff, by Waders and Wildfowl
The Effect of the Cardiff Bay Barrage on Waterfowl Populations 4. Distribution and Movement Studies August 1992 - May 1993
The Effect of the Cardiff Bay Barrage on Waterfowl Populations 5. Distribution and Movement Studies August 1993 - May 1994