@inbook{NBERc5713,
 Crossref = "NBERunkn43-2",
 title = "Preface to "Studies in Income and Wealth"",
 author = "Executive Committee of the Conference on Research in Income and Wealth",
 BookTitle = "Income Size Distributions in the United States, Part I ",
 Publisher = "NBER",
 pages = "-19--17",
 year = "1943",
 URL = "http://www.nber.org/chapters/c5713",
}
@book{NBERunkn43-2,
 title = "Income Size Distributions in the United States, Part I ",
 author = "Conference on Research in Income and Wealth",
 institution = "National Bureau of Economic Research",
 type = "Book",
 publisher = "NBER",
 year = "1943",
 URL = "http://www.nber.org/books/unkn43-2",
}