@inbook{NBERc4003,
 Crossref = "NBERgutt71-2",
 title = "The Cyclical Behavior of the Term Structure of Interest Rates",
 author = "Reuben A. Kessel",
 BookTitle = "Essays on Interest Rates, Vol. 2",
 Publisher = "UMI",
 pages = "337-390",
 year = "1971",
 URL = "http://www.nber.org/chapters/c4003",
}
@book{NBERgutt71-2,
 title = "Essays on Interest Rates, Vol. 2",
 author = "Jack M. Guttentag",
 institution = "National Bureau of Economic Research",
 type = "Book",
 publisher = "UMI",
 year = "1971",
 URL = "http://www.nber.org/books/gutt71-2",
}