@inbook{NBERc3562,
 Crossref = "NBERzarn73-1",
 title = "Appendix B: Supplementary Measures of Timing: Standard and Poor's Data",
 author = "Victor Zarnowitz",
 BookTitle = "Orders, Production, and Investment: A Cyclical and Structural Analysis",
 Publisher = "NBER",
 pages = "669-682",
 year = "1973",
 URL = "http://www.nber.org/chapters/c3562",
}
@book{NBERzarn73-1,
 title = "Orders, Production, and Investment: A Cyclical and Structural Analysis",
 author = "Victor Zarnowitz",
 institution = "National Bureau of Economic Research",
 type = "Book",
 publisher = "NBER",
 year = "1973",
 URL = "http://www.nber.org/books/zarn73-1",
}