@article {	387	,
	title = {The ecology of the American grey squirrel (Sciurus carolinensis Gmelin) in the British Isles.},
	journal = {Proceedings of the Zoological Society of London (1930): 809-843.},
	year = {1930},
	author = {Middleton, A. D.}
}
@article {	388	,
	title = {The grey squirrel.},
	journal = {London, p.68.},
	year = {1931},
	author = {Middleton, A. D.}
}
