Mappae clavicula : a little key to the world of medieval techniques / [edited by] Cyril Stanley Smith and John G. Hawthorne |
Philadelphia : The American philosophical society, 1974. |
Theophilus Presbyter, sec. X-XI |
On divers arts : the foremost medieval treatise on painting, glassmaking and metalwork / Theophilus ; translated from the Latin with introduction and notes by John G. Hawthorne and Cyril Stanley Smith |
New York : Dover, c1979. |