@book {VonEichwald1865,
	title = {Lethaea Rossica ou Pal{\'e}ontologie de la Russie. Second volume. P{\'e}riode moyenne},
	year = {1865},
	pages = {1304},
	publisher = {E. Schweizerbart},
	organization = {E. Schweizerbart},
	address = {Stuttgart},
	keywords = {RCBS, TIP},
	url = {http://archive.org/details/lethaearossicaou02eich},
	author = {von Eichwald, Edouard}
}
