of the seminar for teachers of higher education institutions of the Far East.

of Ershov's lectures.

of Ershov's 1st lecture.

of Ershov's 2nd lecture.

of Ershov's 3rd lecture.

of Ershov's 4th lecture.

of Ershov's 5th lecture.

of Ershov's 6th lecture.

of Ershov's 8th lecture.

Extracts for survey lectures.