From an art historian's workshop : contributions to the œuvre of Dutch and Flemish artists, painting and drawings, an unpublished drawing by Velázquez, an extended discourse on Frederik van Valckenborch drawings / Otto Benesch ; introductions and edited by Eva Benesch.    Lucerne : Gilhofer & Ranschburg Ltd., 1979 . 187 stran, 80 stran obrazových příloh