Results of tystie Cepphus grylle pre-breeding distribution surveys in Shetland, 1982-84, with monitoring recommendations : a report to the Shetland Oil Terminal Environmental Advisory Group /
Ewins, P. J.
Shetland Oil Terminal Environmental Advisory Group.
Edward Grey Institute of Field Ornithology.
Oxford : Edward Grey Institute of Field Ornithology, University of Oxford,
1985.
Includes bibliography.
Black guillemot