Conceptual and Statistical Problems
    Published Date 
  
  
    Copyright 1972
  
  
    ISBN 0870142437
  
 
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      Copy CitationPaul Taubman and Terence Wales, Mental Ability and Higher Educational Attainment in the 20th Century (NBER, 1972), chap. 3, https://www.nber.org/books-and-chapters/mental-ability-and-higher-educational-attainment-20th-century/conceptual-and-statistical-problems.
 
     
    