@inbook{NBERc1509,
 Crossref = "NBERcoha67-1",
 title = "Front matter, YIELDS ON CORPORATE DEBT DIRECTLY PLACED",
 author = "Avery B. Cohan",
 BookTitle = "Yields on Corporate Debt Directly Placed",
 Publisher = "UMI",
 year = "1967",
 URL = "http://www.nber.org/chapters/c1509",
}
@book{NBERcoha67-1,
 title = "Yields on Corporate Debt Directly Placed",
 author = "Avery B. Cohan",
 institution = "National Bureau of Economic Research",
 type = "Book",
 publisher = "UMI",
 year = "1967",
 URL = "http://www.nber.org/books/coha67-1",
}