@inbook{NBERc2994,
 Crossref = "NBERburn46-1",
 title = "Appendix C: Source of Data",
 author = "Arthur F. Burns and Wesley C. Mitchell",
 BookTitle = "Measuring Business Cycles",
 Publisher = "NBER",
 pages = "546-556",
 year = "1946",
 URL = "http://www.nber.org/chapters/c2994",
}
@book{NBERburn46-1,
 title = "Measuring Business Cycles",
 author = "Arthur F. Burns and Wesley C. Mitchell",
 institution = "National Bureau of Economic Research",
 type = "Book",
 publisher = "NBER",
 year = "1946",
 URL = "http://www.nber.org/books/burn46-1",
}