British sipunculans: keys and notes for the identification of the species.
London: Linnean Society of London, 1977. Octavo, text illustrations, softcover. More
London: Linnean Society of London, 1977. Octavo, text illustrations, softcover. More
London: Linnean Society of London, 1979. Octavo, text illustrations, softcover. More
London: British Museum (Natural History), 1865. Octavo, 20 uncoloured lithographs. Publisher's cloth, very good copy. More