▁until ▁ 1 9 3 8 , ▁he ▁moved ▁on ▁to ▁the ▁A zer ba ij an ▁O il ▁Scient ific ▁Research ▁Institute ▁and ▁worked ▁there ▁until ▁ 1 9 4 1 . ▁In ▁ 1 9 4 0 , ▁V . K h ain ▁def ended ▁his ▁Ph . D . ▁th esis ▁at ▁the ▁L ening rad ▁Central ▁Scient ific ▁Research ▁Institute ▁of ▁Ge ological ▁Ex pl oration . ▁As ▁a ▁Red ▁Army ▁d raf te e ▁between ▁ 1 9 4 1 ▁and ▁ 1 9 4 5 , ▁he ▁served ▁in ▁a ▁B aku ▁Air ▁Def ense ▁Army ▁regiment ▁until ▁ 1 9 4 5 . ▁ ▁Academ ic ▁career ▁In ▁ 1 9 4 5 , ▁Kh ain ▁started ▁working ▁for ▁the ▁Institute ▁of ▁Ge ology ▁of ▁the ▁A zer ba ij an ▁Academy ▁of ▁Sciences ▁where ▁he ▁was ▁soon ▁appointed ▁head ▁of ▁the ▁regional ▁ge ology ▁department , ▁teaching ▁at ▁the ▁same ▁time ▁a ▁course ▁on ▁ge ot ect on ics ▁at ▁the ▁A zer ba ij an ▁Indust rial ▁Institute . ▁Under ▁his ▁guidance , ▁a ▁mon ograph ▁titled ▁“ Ge ology ▁of ▁A zer ba ij an ” ▁as ▁well ▁as ▁a ▁ge ological ▁map ▁and ▁a ▁t ect onic ▁map ▁of ▁A zer ba ij an ▁were ▁published . ▁In ▁ 1 9 4 7 ▁he ▁def ended ▁his ▁doctor al ▁th esis ▁on ▁ge ological ▁structure ▁and ▁oil ▁and ▁gas ▁potential ▁of ▁the ▁South - E astern ▁C au cas us ▁at ▁the