Columbia subject headings:
Book industries and trade--Mathematical models.
Book industries and trade--Statistics.
Publishers and publishing--Statistics.
Harvard subject headings:
Book industries and trade--Soviet Union
Book industries and trade--Soviet Union--Statistical methods.
Book industries and trade--Soviet Union--Statistics.
Publishers and publishing--Soviet Union--Statistical methods.
Princeton subject headings:
Book industries and trade--Soviet Union--Statistical methods.
Publishers and publishing--Soviet Union--Statistical methods.