@article {CallanDuck2010,
	title = {Surveys of harbour (common) seals around Scotland August 2008},
	number = {361},
	year = {2010},
	keywords = {Marine Mammals, Seals},
	issn = {324 (ROAME No. R07AC707)},
	url = {http://www.snh.org.uk/pdfs/publications/commissioned_reports/361.pdf},
	author = {Duck, C}
}
@article {CallanDuck2012,
	title = {Surveys of harbour (common) and grey seals in the Outer Hebrides and the Moray Firth in August 2011},
	number = {518},
	year = {2012},
	keywords = {Marine Mammals, Seals},
	url = {http://www.snh.org.uk/pdfs/publications/commissioned_reports/518.pdf},
	author = {Duck, C and Morris, C and Sea Mammal Research Unit, NERC}
}
