Romano-Celtic mask puzzle padlocks : a study in their design, technology and security /

: This book presents a little-known and ingenious artefact of the Roman world: a small puzzle padlock whose font plate bears a face or 'mask' of 'Celtic' style.
: Previously issued in print: 2017. : 1 online resource : illustrations (colour) : Specialized. : 9781784915650 (ebook) :