Iconclass an iconographic classification system. 5-6 (1978)/ compl. and ed. by L.D. Couprie with E. Tholen, G. Vellekoop / H. van de Waal ; completed and ed. by L.D. Couprie with R.H. Fuchs ... [et al.] ; Koninklijke Nederlandse Akademie van Wetenschappen. System