@inbook{NBERc10505,
 Crossref = "NBERaesm77-1",
 title = "On Numerical Computation in Simultaneous Equation Systems",
 author = "Warren T. Dent",
 BookTitle = "Annals of Economic and Social Measurement, Volume 6, number 1",
 Publisher = "NBER",
 pages = "123-125",
 year = "1977",
 URL = "http://www.nber.org/chapters/c10505",
}
@book{NBERaesm77-1,
 title = "Annals of Economic and Social Measurement, Volume 6, number 1",
 author = "Sanford V. Berg, editor",
 institution = "National Bureau of Economic Research",
 type = "Book",
 publisher = "NBER",
 year = "1977",
 URL = "http://www.nber.org/books/aesm77-1",
}