@inbook{NBERc12288,
 Crossref = "NBERannu54-1",
 title = "Economic Progress and Economic Change",
 author = "Solomon Fabricant",
 BookTitle = "Economic Progress and Economic Change",
 Publisher = "NBER",
 year = "1954",
 month = "May",
 URL = "http://www.nber.org/chapters/c12288",
}
@book{NBERannu54-1,
 title = "Economic Progress and Economic Change",
 author = "Solomon Fabricant",
 institution = "National Bureau of Economic Research",
 type = "Book",
 publisher = "NBER",
 year = "1954",
 URL = "http://www.nber.org/books/annu54-1",
}