The numbers and status of waterbirds using Cardiff Bay from 1999/2000 to 2001/2002 /
Burton, N. H. K.
Clark, Nigel A.
British Trust for Ornithology
Cardiff Harbour Authority
Thetford : British Trust for Ornithology,
2005.
"September 2002"--T.p.
"A report by the British Trust for Ornithology under contract to Cardiff Harbour Authority"--T.p. verso.
Bibliography, p. 321