A historical review of the bird populations of the Taff/Ely estuary and surrounding areas /
Donald, P. F.
Clark, N. A.
British Trust for Ornithology.
Cardiff Bay Development Corporation.
Thetford : British Trust for Ornithology,
2003.
"A report from the British Trust for Ornithology to Cardiff Bay Development Corporation"--T.p.
"February 1992".