@inbook {1278,
	title = {Refining and testing the Ellenberg Index  biomonitoring method at the intensive sites},
	year = {2005},
	pages = {230},
	publisher = {JNCC},
	organization = {JNCC},
	edition = {Biomonitoring methods for assessing the impacts of nitrogen pollution: refinement and testing},
	chapter = {4},
	author = {Pitcairn, C.E.R. and Leith, I.D. and van Dijk N. and Sutton, M.A.}
}
