@book {VonKlipstein1843,
	title = {Beitr{\"a}ge zur geologischen Kenntniss der {\"o}stlichen Alpen},
	year = {1843},
	pages = {311, 20 pl.},
	publisher = {Georg Freidrich Heyer},
	organization = {Georg Freidrich Heyer},
	address = {Giessen},
	keywords = {RCBS, TIP},
	url = {http://books.google.com/books?id=ZIERAAAAIAAJ},
	author = {von Klipstein, A}
}
@book {Quenstedt1843,
	title = {Das Fl{\"o}zgebirge W{\"u}rtembergs. Mit besonderer R{\"u}cksicht auf den Jura},
	year = {1843},
	pages = {560},
	publisher = {H. Laupp},
	organization = {H. Laupp},
	address = {T{\"u}bingen},
	keywords = {RCBS, TIP},
	url = {http://books.google.com/books?id=3fYTAAAAQAAJ},
	author = {Quenstedt, Friedrich August}
}
@book {Morris1843,
	title = {A Catalogue of British Fossils. Comprising all the genera and species hitherto described; with references to their geological distribution and to the localities in which they have been found},
	year = {1843},
	pages = {222},
	publisher = {John van Voorst},
	organization = {John van Voorst},
	address = {London},
	keywords = {RCBS, TIP},
	url = {http://books.google.com/books?id=FanfwEarq2sC},
	author = {Morris, John}
}
@book {Michelin1843,
	title = {Iconographie zoophytologique. Description par localit{\'e}s et terrains des polypiers fossiles de France, et pays environnants},
	volume = {3},
	year = {1843},
	pages = {73{\textendash}104 (pl. 6{\textendash}8)},
	publisher = {P. Bertrand},
	organization = {P. Bertrand},
	address = {Paris},
	keywords = {BL, JS, RCBS, TIP},
	url = {http://archive.org/details/iconographiezoop00mich},
	author = {Michelin, Hardouin}
}
@article {D{\textquoteright}Archiac1843,
	title = {Description g{\'e}ologique du D{\'e}partement de l{\textquoteright}Aisne},
	journal = {Mémoires de la Société Géologique de France, 1e s{\'e}rie},
	volume = {5},
	number = {3},
	year = {1843},
	pages = {129{\textendash}418},
	keywords = {BL, TIP},
	url = {http://books.google.com/books?id=U0HnAAAAMAAJ},
	author = {D{\textquoteright}Archiac, Adolphe}
}
