˜'Theœ book on how one makes colours of all shades in order to illuminate books' revisited

Veröffentlicht in ˜Theœ artist's process / ed. by Sigrid Eyb-Green, Joyce H. Townsend ... [u.a.] (2012)

Copper pigments in medieval times : green, blue, greenish-blue or bluish-green?

Veröffentlicht in Sources and serendipity / ed. by Erma Hermens and Joyce H. Townsend (2009)