A study of the risk of collision with power lines by common terns at Shotton Steel Works, North Wales /
Henderson, I. G.
Langston, R. H. W.
Clark, N. A.
British Trust for Ornithology.
National Power (Firm)
Thetford : British Trust for Ornithology,
1997.
"A report by the British Trust for Ornithology to National Power.