@book {174,
	title = {The Sipuncula. Their systematics, biology and evolution},
	year = {1994},
	pages = {453 pp},
	publisher = {Cornell University Press},
	organization = {Cornell University Press},
	address = {Ithaca, N.Y.},
	author = {Cutler, E. B.}
}
@article {189,
	title = {A revision of the genus Aspidosiphon (Sipuncula)},
	journal = {Proceedings of the Biological Society of Washington},
	volume = {102},
	year = {1989},
	pages = {826-865},
	author = {Cutler, E. B. and Cutler, N. J.}
}
