There are no publications covering makers marks because the Goldsmith's company consider them copyright and, any use of the mark in a publication is considered advertising which is against the rules of the guild.
However, they have softened a little and if you email them they will possibly tell you. However, on one mark they claimed it was not existing until I found out through another source and they then found and confirmed. Google for an address.
There is also website that covers many makers marks and this is expanding, you should find a link in a reply to a query from Ray on here somewhere... or google.