Columbia subject headings:
Books and reading--Soviet Union.
Libraries and adult education--Soviet Union.
Readers' advisory services--Soviet Union.
Working class--Books and reading--Soviet Union.
Harvard subject headings:
Books and reading--Soviet Union
Libraries and adult education--Soviet Union.
Readers' advisory services--Soviet Union.
Working class--Books and reading--Soviet Union
Working class--Books and reading--Soviet Union.
Princeton subject headings: