British and other phoronids: keys and notes for the identification of the species
Emig, C.C. (1979). British and other phoronids: keys and notes for the identification of the species. Synopses of the British Fauna, N.S. 13. Academic Press: London. ISBN 0-12-238750-3. 57 pp.
Part of: Barnes, R.S.K.; Crothers, J.H. (Ed.) Synopses of the British Fauna. Linnean Society of London: London; New York. ISSN 0082-1101, more