@inbook{NBERc9700,
 Crossref = "NBERunkn46-1",
 title = "Preface",
 author = "Arthur F. Burns",
 BookTitle = "Economic Research and the Development of Economic Science and Public Policy",
 Publisher = "NBER",
 year = "1946",
 month = "June",
 URL = "http://www.nber.org/chapters/c9700",
}
@book{NBERunkn46-1,
 title = "Economic Research and the Development of Economic Science and Public Policy",
 author = "NBER",
 institution = "National Bureau of Economic Research",
 type = "Book",
 publisher = "NBER",
 year = "1946",
 URL = "http://www.nber.org/books/unkn46-1",
}