Problems of Classification and Presentation
    Published Date 
  
  
    Copyright 1967
  
  
    ISBN 0870144448
  
 
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      Copy CitationGeoffrey H. Moore and Julius Shiskin, Indicators of Business Expansions and Contractions (NBER, 1967), chap. 4, https://www.nber.org/books-and-chapters/indicators-business-expansions-and-contractions/problems-classification-and-presentation.
 
     
    