A guide to the elephants (recent and fossil) exhibited in the Department of geology and palæntology in the British museum (Natural history) ...
London,Printed by order of the Trustees of the British museum,1922.
University of California Libraries (archive.org)
Public domain. The BHL considers that this work is no longer under copyright protection.
Evidence reported by ian white for item guideelephants00britrich on March 2, 2007: no visible notice of copyright; stated date is 1922.