@book{42183,
	author = {Tortello, M. Franco and Clarkson, Euan N.K. and Asociación Palentológica Argentina},
	title = {Ortogeny, structure and moulting of Parabolina frequens argentina (Kayser) (Trilobita, Olenidae) from te Furongian of northwestern Argentina.},
	note = {Relevamiento: 2008.}
}