@inbook {Lonsdale1850,
	title = {Descriptions of the fossils of the Chalk Formation},
	booktitle = {The Geology and Fossils from the Tertiary and Cretaceous Formations of Sussex},
	year = {1850},
	pages = {237{\textendash}324, pl. 18},
	publisher = {Longman, Brown, Green, and Longmans},
	organization = {Longman, Brown, Green, and Longmans},
	address = {London},
	keywords = {RCBS, TIP},
	url = {http://archive.org/details/geologyfossilsof00dixo},
	author = {Lonsdale, W},
	editor = {Dixon, Frederick}
}
