Marine monitoring project : ground and aerial monitoring protocols for in shore special protection areas : common Scoter surveys in Carmarthen Bay during the winter of 2002-03 = Prosiect monitro morol : protocoliau monitro ar y ddaear ac o'r awyr ar gyfer ardaloedd gwarchodaeth arbennig ger y glannau : arolygon o fôr-hwyaid duon ym Mae Caerfyrddin yn ystod gaeaf 2002-03.
Musgrove, Andy.
British Trust for Ornithology,
2006.