@book {694,
	title = {Sipuncula},
	series = {Fauna Ib{\'e}rica},
	volume = {4},
	year = {1993},
	pages = {200 pp},
	publisher = {Museuo Nacional de Ciencias Naurales CSIC},
	organization = {Museuo Nacional de Ciencias Naurales CSIC},
	address = {Madrid},
	author = {Saiz Salinas, J. I.}
}
