

@article {1998,
	title = {Specifity in the genus <i>Balantidium </i>based on size and shape of body and macronucleus, with descriptions of six new species},
	journal = {American Journal of Hygiene},
	volume = {19},
	year = {1934},
	pages = {38-67},
	author = {Hegner, R. W.}
}
