@inbook{NBERc2299,
 Crossref = "NBERshis61-1",
 title = "Appendix A: Technical Notes on Amplitude-Adjusted General Indexes, Adjusted Rates of Change, and Diffusion Indexes",
 author = "Julius Shiskin",
 BookTitle = "Signals of Recession and Recovery: An Experiment with Monthly Reporting",
 Publisher = "NBER",
 pages = "123-141",
 year = "1961",
 URL = "http://www.nber.org/chapters/c2299",
}
@book{NBERshis61-1,
 title = "Signals of Recession and Recovery: An Experiment with Monthly Reporting",
 author = "Julius Shiskin",
 institution = "National Bureau of Economic Research",
 type = "Book",
 publisher = "NBER",
 year = "1961",
 URL = "http://www.nber.org/books/shis61-1",
}