https://en.wikipedia.org/wiki/Don_River_(Russia)
for Russian economy, look at CIA World Factbook on line.
5-7-2017
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https://reedsy.com/discovery/blog/best-post-apocalyptic-books
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The maker of this replica seems to have assumed, anomalously, that the corner towers were in the Banteay Srei style -- visually, as you can ... -
https://www.youtube.com/watch?v=ua55nu0X_Ro