@inbook{NBERc9907,
 Crossref = "NBERaesm73-3",
 title = "Programs And Methods For Input-Output Analysis--A Preview",
 author = "Clopper Almon",
 BookTitle = "Annals of Economic and Social Measurement, Volume 2, number 3",
 Publisher = "NBER",
 pages = "303-304",
 year = "1973",
 month = "July",
 URL = "http://www.nber.org/chapters/c9907",
}
@book{NBERaesm73-3,
 title = "Annals of Economic and Social Measurement, Volume 2, number 3",
 author = "Sanford V. Berg, editor",
 institution = "National Bureau of Economic Research",
 type = "Book",
 publisher = "NBER",
 year = "1973",
 URL = "http://www.nber.org/books/aesm73-3",
}