@article {6041,
	title = {Descriptions of new marine shells, from Upper California},
	journal = {Journal of the Academy of Natural Sciences of Philadelphia},
	volume = {7},
	number = {Part 2},
	year = {1837},
	note = {Pls. 17-20 [256, pl.19, fig.6]Isognomonidae 245-246; pl.19, figs.9, 13Pteriidae 246; pl.19, fig.6Pinnidae 244-245, pl.19-20},
	pages = {227-268},
	keywords = {avicula, biogeography, bivalvia, isognomonidae, mollusca, perna, pinctada, pinna, pinnidae, pinnoidea, pteriidae, pterioida, pterioidea, taxonomy},
	author = {Conrad, T. A.}
}
@article {1062,
	title = {Descriptions of new marine shells, from Upper California},
	journal = {Journal of the Academy of Natural Sciences of Philadelphia},
	volume = {7},
	number = {Part 2},
	year = {1837},
	pages = {227-268},
	keywords = {avicula, biogeography, bivalvia, isognomonidae, mollusca, perna, pinctada, pinna, pinnidae, pinnoidea, pteriidae, pterioida, pterioidea, taxonomy},
	author = {Conrad, T. A.}
}
