@inbook{NBERc9890,
 Crossref = "NBERaesm73-2",
 title = "A Guide to the 1960-1971 Current Population Survey Files",
 author = "Jodie T. Allen",
 BookTitle = "Annals of Economic and Social Measurement, Volume 2, number 2",
 Publisher = "",
 pages = "187-197",
 year = "1973",
 month = "April",
 URL = "http://www.nber.org/chapters/c9890",
}
@book{NBERaesm73-2,
 title = "Annals of Economic and Social Measurement, Volume 2, number 2",
 author = "Sanford V. Berg, editor",
 institution = "National Bureau of Economic Research",
 type = "Book",
 publisher = "",
 year = "1973",
 URL = "http://www.nber.org/books/aesm73-2",
}