@inbook{NBERc3235,
 Crossref = "NBERmoor50-1",
 title = "Appendix A: A Technique for Summarizing the Current Behavior of Groups of Indicators",
 author = "Geoffrey H. Moore",
 BookTitle = "Statistical Indicators of Cyclical Revivals and Recessions",
 Publisher = "NBER",
 pages = "78-91",
 year = "1950",
 URL = "http://www.nber.org/chapters/c3235",
}
@book{NBERmoor50-1,
 title = "Statistical Indicators of Cyclical Revivals and Recessions",
 author = "Geoffrey H. Moore",
 institution = "National Bureau of Economic Research",
 type = "Book",
 publisher = "NBER",
 year = "1950",
 URL = "http://www.nber.org/books/moor50-1",
}