{"id":"000995983","type":"book","title":"Engraved gems and signet rings","publisher":"Rijksdienst voor Archeologie, Cultuurlandschap en Monumenten","publisher-place":"Amersfoort","pages":"121-136","container-title":"The Valkenburg excavations 1985-1988 : Introduction and detail studies","author":[{"family":"Bosman","given":"Arjen V. A. J."}],"issued":{"raw":"1993"}}