@book {5807,
	title = {Syst{\^e}me Silurien du centre de la Boh{\^e}me. 1{\`e}re partie: recherches pal{\'e}ontologiques},
	volume = {6. Classe des mollusques. Ordre des ac{\'e}phal{\'e}s},
	year = {1881},
	note = {JPG},
	pages = {???},
	publisher = {L{\textquoteright}auteur},
	organization = {L{\textquoteright}auteur},
	address = {Prague, Paris},
	keywords = {bivalvia, cambrian, devonian, mollusca, ordovician, paleontology, Pterineidae, pterioidea, silurian, taxonomy},
	author = {Barrande, Joachim}
}
@book {974,
	title = {Syst{\^e}me Silurien du centre de la Boh{\^e}me. 1{\`e}re partie: recherches pal{\'e}ontologiques},
	volume = {6. Classe },
	year = {1852},
	publisher = {L{\textquoteright}auteur},
	organization = {L{\textquoteright}auteur},
	address = {Prague, Paris},
	keywords = {bivalvia, cambrian, devonian, mollusca, ordovician, paleontology, Pterineidae, pterioidea, silurian, taxonomy},
	author = {Barrande, Joachim}
}
