@inbook{NBERc2731,
 Crossref = "NBERjuli57-1",
 title = "Appendix B: Basic Data and Sources for Eighteen Business Indicators, 1956-57",
 author = "Julius Shiskin",
 BookTitle = "Electronic Computers and Business Indicators",
 Publisher = "NBER",
 pages = "40-49",
 year = "1957",
 URL = "http://www.nber.org/chapters/c2731",
}
@book{NBERjuli57-1,
 title = "Electronic Computers and Business Indicators",
 author = "Julius Shiskin",
 institution = "National Bureau of Economic Research",
 type = "Book",
 publisher = "NBER",
 year = "1957",
 URL = "http://www.nber.org/books/juli57-1",
}