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WikiPedia: 2S7_Pion http://today.az/news/politics/75210.html http://www.armyrecognition.com/georgia/georgia_arm... http://www.military-today.com/artillery/2s7_pion.h... http://www.globalsecurity.org/military/world/russi... http://militaryforces.ru/weapon-3-55-314.html http://warfare.ru/?lang=&catid=240&linkid=1564&lin... https://commons.wikimedia.org/wiki/2S7_Pion?uselan...