@inbook{NBERc5460,
 Crossref = "NBERcrum56-1",
 title = "Differences Accorrding to Size of Corporation",
 author = "William Leonard Crum",
 BookTitle = "Fiscal-Year Reporting for Corporate Income Tax",
 Publisher = "NBER",
 pages = "350-361",
 year = "1956",
 URL = "http://www.nber.org/chapters/c5460",
}
@book{NBERcrum56-1,
 title = "Fiscal-Year Reporting for Corporate Income Tax",
 author = "William Leonard Crum",
 institution = "National Bureau of Economic Research",
 type = "Book",
 publisher = "NBER",
 year = "1956",
 URL = "http://www.nber.org/books/crum56-1",
}