@book {614,
	title = {Ellenberg{\textquoteright}s indicator values for British plants: ECOFACT volume 2 technical annex.},
	year = {1999},
	publisher = {HMSO},
	organization = {HMSO},
	author = {Hill, M.O. and Mountford, J.O. and Roy, D.B. and Bunce, R.G.H.}
}
