Guide to the coral gallery (Protozoa, Porifera or sponges, Hydrozoa, and Anthozoa), in the Department of Zoology, British Museum (Natural history)
London :Printed by order of the Trustees,1907.
Public domain. The BHL considers that this work is no longer under copyright protection.
Evidence reported by Internet Archive biblio tool for item guidetocoralgall00brituoft on March 11, 2008: no visible notice of copyright; stated date is 1907.