Expression and sensibility art technological sources and the rise of modernism : proceedings of the seventh symposium of the ICOM-CC working group on Art Technological Source Research, held at the State Academy of Fine Art and Design, Stuttgart, 10-11 November 2016 - Krekel, Christoph; Townsend, Joyce H.; Eyb-Green, Sigrid; Kirby, Jo; Pilz, Kathrin Maria