@inbook{NBERc0815,
 Crossref = "NBERexpl37-2",
 title = "Public Obligations",
 author = "Winfield W. Riefier, Chairman and David Friday and Walter Lichtenstein and J. H. Riddle",
 BookTitle = "A Program of Financial Research Vol 2: Inventory of Current Research on Financial Problems",
 Publisher = "NBER",
 pages = "202-206",
 year = "1937",
 URL = "http://www.nber.org/chapters/c0815",
}
@book{NBERexpl37-2,
 title = "A Program of Financial Research Vol 2: Inventory of Current Research on Financial Problems",
 author = "Winfield W. Riefier, Chairman and David Friday and Walter Lichtenstein and J. H. Riddle",
 institution = "National Bureau of Economic Research",
 type = "Book",
 publisher = "NBER",
 year = "1937",
 URL = "http://www.nber.org/books/expl37-2",
}