Columbia subject headings:
Labor supply--Effect of technological innovations on--Europe, Eastern.
Labor supply--Effect of technological innovations on--Soviet Union.
Working class--Europe, Eastern.
Working class--Soviet Union.
Harvard subject headings:
Labor supply--Effect of technological innovations on--Europe, Eastern.
Labor supply--Effect of technological innovations on--Soviet Union.
Working class--Europe, Eastern
Working class--Soviet Union
Princeton subject headings:
Working class--Europe, Eastern.