Llyn Tegid hydroacoustic surveys 2007 /
Winfield, Ian J.,1959-
Fletcher, Janice M.
James, J. Ben.
Wales.Welsh Assembly Government.
Countryside Council for Wales.
Bangor : Countryside Council for Wales,
2007.
Contract number: FC 73-02-304.
'Final report'.
Includes bibliographical references.
Coregonus lavaretus
Underwater acoustics