@article {Dunagan1957,
	title = {Helminth parasites of Alaskan Muskrats},
	journal = {Transactions of the American Microscopical Society},
	volume = {76},
	number = {3},
	year = {1957},
	pages = {318-320},
	author = {Dunagan, T.T.}
}
@article {Chitwood1957,
	title = {The {English} word {\textquoteright}{Nema}{\textquoteright} revisited},
	journal = {Systematic Zoology},
	volume = {6},
	year = {1957},
	pages = {184{\textendash}186},
	author = {Chitwood, B. G.}
}
@article {LaRue1957_291,
	title = {The classification of Digenetic Trematoda: a review and a new system},
	journal = {Experimental Parasitology},
	volume = {6},
	year = {1957},
	pages = {306{\textendash}349},
	author = {La Rue, G. R.}
}
