@article {665,
	title = {Conservation of freshwater fish in the British Isles: the status of fish in National Nature Reserves},
	journal = {Aquatic Conservation: Marine and Freshwater Ecosystems },
	volume = {2},
	year = {1992},
	pages = {19-34},
	author = {Lyle, A.A. and Maitland, P.S.}
}
@article {666,
	title = {Conservation of freshwater fish in the British Isles: the current status and biology of threatened species. Aquatic Conservation },
	journal = {Marine and Freshwater Ecosystems },
	volume = {1},
	year = {1991},
	pages = {25-54},
	author = {Maitland, P.S. and Lyle, A.A.}
}
