@inbook{NBERc2680,
 Crossref = "NBERunkn57-2",
 title = "Front matter, Problems in the International Comparison of Economic Accounts",
 author = "Conference on Research in Income And Wealth",
 BookTitle = "Problems in the International Comparison of Economic Accounts",
 Publisher = "UMI",
 year = "1957",
 URL = "http://www.nber.org/chapters/c2680",
}
@book{NBERunkn57-2,
 title = "Problems in the International Comparison of Economic Accounts",
 author = "",
 institution = "National Bureau of Economic Research",
 type = "Book",
 publisher = "UMI",
 year = "1957",
 URL = "http://www.nber.org/books/unkn57-2",
}