@book {625,
	title = {The phyla Sipuncula and Echiura},
	year = {1972},
	pages = {528 pp},
	publisher = {Trustees British Mus. (Nat. Hist.)},
	organization = {Trustees British Mus. (Nat. Hist.)},
	address = {London},
	author = {Stephen, A. C. and Edmonds, S. J.}
}
@article {613,
	title = {Sipunculids},
	journal = {B.A.N.Z.A.R.E. Reports, Series B},
	volume = {5},
	number = {4},
	year = {1948},
	pages = {213-220},
	author = {Stephen, A. C.}
}
