{"value"=>"<p>Heinrich von Wittgenstein.</p> <p>Köln: Rheinisch-Westfälischen Wirtschaftsarchiv, 1981.</p> <p>Typed book</p> <p>This book has to do with Frédérique Mayer Petrides' great Grandfather.</p> <p>Related names and works: Wittgenstein, Heinrich von; Petrides, Frédérique.</p>"}