@article {Gray1842,
	title = {The northern zoological gallery},
	journal = {Synopsis of the Contents of the British Museum},
	volume = {44},
	year = {1842},
	pages = {97{\textendash}157},
	url = {http://books.google.com/books?id=p9IHAAAAQAAJ},
	author = {Gray, John E}
}
@article {Gray1840,
	title = {South rooms of the north gallery},
	journal = {Synopsis of the Contents of the British Museum},
	volume = {41},
	year = {1840},
	pages = {54{\textendash}84},
	url = {http://books.google.com/books?id=l25UAAAAYAAJ},
	author = {Gray, John E}
}
