1. 
   ZSU-23-4
   Tracked armoured air defence gun system [SU;RU]
   Found op http://www.jedsite.info/index.html
   
   
2. 
   Zsu-23-4
   The ZSU-23-4 is a Soviet self-propelled anti-aircraft gun developed during the 1960s as a replacement for the ZSU-57-2. The ZSU-23-4 has radar fire-control and an increased rate of fire over the ZSU-57-2, and was particularly effective with the Egyptian army during the Yom Kippur War and the North V...
   Found op http://www.probertencyclopaedia.com/browse/FAFVZ.HTM
   
   

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