Unidentified Photographer Roman Vishniac [Postcard from Roman Vishniac in Warsaw to his daughter Mara in Riga] Date 1938 Location Poland Latvia Warsaw Riga Dimensions Image (paper): 5 9/16 x 3 15/16 in. (14.1 x 10 cm) Print medium Photo-Gelatin silver Credit Line Collection Mara Vishniac Kohn Accession No. mvk.e.195.2011