@inbook{NBERc5705,
 Crossref = "NBERunkn49-1",
 title = "Front matter to "Studies in Income and Wealth"",
 author = "Martha Anderson, editor",
 BookTitle = "Studies in Income and Wealth",
 Publisher = "UMI",
 year = "1949",
 URL = "http://www.nber.org/chapters/c5705",
}
@book{NBERunkn49-1,
 title = "Studies in Income and Wealth",
 author = "Martha Anderson, editor",
 institution = "National Bureau of Economic Research",
 type = "Book",
 publisher = "UMI",
 year = "1949",
 URL = "http://www.nber.org/books/unkn49-1",
}