Gladius Scabbard Books

[Doc]

Could anyone recommend a good book on gladii scabbards which contains along with the pictures the details of the materials used, the sizes or dimensions of the scabbards, the decoration on the scabbards, the approximate date (I'm looking for 1st century scabbards). Preferably a book with color plates is desirable however any detailed book is fine.

There is a good book by Jurgen Obmann that was recommended to me for pugio scabbards. Thus I was wondering if something of that nature was around for gladii scabbards.

Thanks

Paolo