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Books about Pravdin:
Pravdin, Vladimir Sergeevich
Interaktivnye sredstva tekhnologicheskoy podgotovki proizvodstva: Razrabotka interaktivnykh programmnykh sredstv... (2011)
Wiki information Pravdin:
Pravdinsk, prior to 1946 known by its German name Friedland is a town and the administrative center of Pravdinsky District in Kaliningrad Oblast, Russia, located on the Lava River, approximately 30 kilometers east of Bagrationovsk and 53 kilometers...
Vladimir Pravdin or Roland Lyudvigovich Abbiate codename LETCHIK was a senior NKVD assassin working in Europe during the Great Terror. He later became a KGB agent, stationed in the United States.