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@inbook {822,
	title = {Monitoring with Lichens - Monitoring Lichens},
	booktitle = {Nato Sciences },
	year = {2002},
	pages = {285-290},
	publisher = {Kluwer},
	organization = {Kluwer},
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	author = {Van Herk, C.M. and Nimis, P.L. (Eds) and Scheidegger, C. (Eds) and Wolseley, P.A.}
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@article {699,
	title = {Monitoring with Lichens - Monitoring Lichens,Proceedings of the NATO Advanced Research Workshop on Lichen Monitoring, Wales, United Kingdom, 16-23 August 2000},
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}
