@article {786,
	title = {A brief account of the fresh water species of Planariae inhabiting the United States},
	journal = {Proceedings of the Boston Society of Natural History},
	volume = {3},
	year = {1850},
	pages = {264-265},
	url = {http://www.biodiversitylibrary.org/item/35741$\#$page/272/mode/1up},
	author = {Charles Fr{\'e}d{\'e}ric Girard}
}
@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}
}
@book {785,
	title = {Systema Helminthum},
	volume = {1},
	year = {1850},
	pages = {xv+680},
	url = {https://archive.org/stream/systemahelminth00diesgoog$\#$page/n6/mode/2up},
	author = {Diesing, Karl Moritz}
}
