I have found that 'Tabellary' means 'relating to secret balloting by tablets, among the ancient Romans', but I am not referring to this meaning of the adjective.
I am talking about a kind of wood engraving and I want to find sth appropriate for that.
The original sentence says:
Las mejores fueron las conocidas como impresiones tabelarias o incunables xilográficos
and my attempt:
The best ones were known as wooden tablets impressions or xilographic incunabula