Columbia subject headings:
Dyers--Italy--Siena.
Dyes and dyeing--Italy--Siena--History.
Landoccio, di Cecco d'Orso, active 14th century.
Harvard subject headings:
Coloring matter--History--To 1500--Sources.
Dyes and dyeing--Italy--Siena--History--To 1500--Sources.
Landoccio, di Cecco d'Orso, active 14th century--Archives.
Middle Ages.
Siena (Italy)--Economic conditions--Sources.
Princeton subject headings:
Coloring matter--History--To 1500--Sources.
Dyes and dyeing--Italy--Siena--History--To 1500--Sources.
Landoccio, di Cecco d'Orso, active 14th century--Archives.
Middle Ages.