- wikiwand.com en/Bolshoy_IrgizThe Bolshoy Irgiz or Irgiz (Иргиз) is a river in Samara and Saratov Oblast, Russia, a left tributary of the Volga, south of the Samara River.
- http://tolstyslovar.com en?Bolshoy Irgiz River
- abesu.org bolshoy-irgiz-i-reka-revyaka
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