Congratulations
head of the Department of hydrogeology, Professor Igor Udalova
with the successful defense of the doctoral thesis
on the topic: “Cycles of technogenic transformation of the geological environment and the creation of a system of ecological security of the North-Eastern Donbass”
We wish you continued success!!!
![CPoS0tzZ_Ac](http://wptest.ru/wp-content/uploads/2016/11/CPoS0tzZ_Ac-300x225.jpg)