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	title = {Time-space analyses of the British lichen flora, with particular reference to air quality surveys},
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	volume = {32},
	year = {1998},
	pages = {85-96},
	author = {Seaward, M. R. D.}
}
@article {249,
	title = {Large-scale air pollution monitoring using lichens},
	journal = {GeoJournal },
	volume = {28},
	year = {1992},
	pages = {403-411},
	author = {Seaward, M. R. D.}
}
@book {758,
	title = {Atlas of the lichens of the British Isles},
	volume = {1},
	year = {1982},
	publisher = {ITE},
	organization = {ITE},
	address = {Cambridge},
	author = {Seaward, M. R. D. and Hitch, C.J.B. (Eds)}
}
