Iconclass an iconographic classification system. 8-9 (1980)/ compl. and ed. by L.D. Couprie with E. Tholen, G. Vellekoop ; with the assistance of W.H. de Haan-van de Wiel ... [et al.] / H. van de Waal ; completed and ed. by L.D. Couprie with R.H. Fuchs ... [et al.] ; Koninklijke Nederlandse Akademie van Wetenschappen. System