Members of the Soviet Politburo sign an order, prepared by Lavrenti
Beria, for the execution of 25,700 Polish intelligentsia, including
14,700 Polish POWs.
Citation:
Editors. "Katyn Massacre".
The Literary Encyclopedia. First published 01 May 2009
[http://www.litencyc.com/php/stopics.php?rec=true&UID=7178, accessed 25 May 2013.]