@article {631,
	title = {An essay on the classification of Nemertes and Planariae: preceded by some general considerations on the primary divisions of the animal kingdom.},
	journal = {Proceedings of the American Association for the Advancement of Science},
	volume = {4th Meeting},
	year = {1850},
	pages = {258-273},
	address = {Washington},
	author = {Charles Fr{\'e}d{\'e}ric Girard}
}
