"No restrictions on access"@en . . . "irn9455" . "The postage stamp was donated to the United States Holocaust Memorial Museum in 1995 by Irina Kamenkovich, Tamara Kamenkovich, and Natella Voiskinskaya, the family of Ilya Kamenkovitch."@en . . "No restrictions on use"@en . . . "Postage stamp"@en . "DDR 25; Netherlands"@en .