Title: Secret knowledge
First published: 2001
Subjects: Camera lucidas, Painting, Technique, Camera obscuras, Technological innovations, Optics and art, Drawing, History, Schilderkunst, Techniek, Optische instrumenten, Cameras, Drawing, technique, Painting, technique, Painting, history, Drawing, history, Technology and the arts, Optics
LC classification: ND1471 .H63 2001