. "For more information about the owners of the correspondence, Lutz and Lisel Neumann aka Ludwig and Luise Neumann see WL Doc Collection 1023."@en . . "Lutz and Lisel Neumann"@en . . "WL1016" . . "1 folder"@en . "Nothing is known about the provenance of this correspondence."@en . . . . . "Open"@en .