@inbook{NBERc0718,
 Crossref = "NBERmoor61-2",
 title = "Original and Seasonally Adjusted Data, and Seasonal Indexes: Diffusion Indexes",
 author = "Geoffrey H. Moore",
 BookTitle = "Business Cycle Indicators, Vol. 2",
 Publisher = "Princeton University Press",
 pages = "155-179",
 year = "1961",
 URL = "http://www.nber.org/chapters/c0718",
}
@book{NBERmoor61-2,
 title = "Business Cycle Indicators, Vol. 2",
 author = "Geoffrey H. Moore",
 institution = "National Bureau of Economic Research",
 type = "Book",
 publisher = "Princeton University Press",
 year = "1961",
 URL = "http://www.nber.org/books/moor61-2",
}