@inbook{NBERc10446,
 Crossref = "NBERaesm76-2",
 title = "NBER Computer Research Center Notes",
 author = "",
 BookTitle = "Annals of Economic and Social Measurement, Volume 5, number 2",
 Publisher = "NBER",
 pages = "263-265",
 year = "1976",
 month = "April",
 URL = "http://www.nber.org/chapters/c10446",
}
@book{NBERaesm76-2,
 title = "Annals of Economic and Social Measurement, Volume 5, number 2",
 author = "Sanford V. Berg, editor",
 institution = "National Bureau of Economic Research",
 type = "Book",
 publisher = "NBER",
 year = "1976",
 URL = "http://www.nber.org/books/aesm76-2",
}