for the author's abstract of Ershov's dissertation

for the author's abstract of doctoral thesis

of the doctoral thesis (clean copy; typewritten)

of the doctoral thesis (draft copy; typewritten)

of the doctoral thesis. Second copy (handwritten)

of the doctoral thesis. First copy (handwritten)

"billets" of official documents necessary for the thesis defence (handwritten)

informing the addressee that he is appointed an official opponent for the defence, requesting to prepare the comment in time, and notifying that all the trip expenses are assumed by SBAS

on sending over Ershov's doctoral thesis to the Council of Mathematical section with the request to accept it for the defence

of the Specialized Council session for the defence of Ershov's doctoral thesis

on Ershov's thesis

of the thesis

of Scientific council of Computing Center SB AS on A.P.Ershov's doctoral thesis