@book {708,
	title = {Ecology of dunes, salt marsh and shingle},
	year = {1997},
	publisher = {Chapman and Hall},
	organization = {Chapman and Hall},
	address = {London},
	author = {Packham, J.R. and Willis, A.J.}
}
@article {842,
	title = {Braunton Burrows: The effects on the vegetation of the addition of mineral nutrients to the dune soils},
	journal = {Journal of Ecology },
	volume = {51},
	year = {1963},
	pages = {353-374},
	author = {Willis, A.J.}
}
