@inbook{NBERc3650,
 Crossref = "NBERtaub74-1",
 title = "The NBER-TH Sample: A Description",
 author = "Paul J. Taubman and Terence Wales",
 BookTitle = "Higher Education and Earnings: College as an Investment and Screening Device",
 Publisher = "UMI",
 pages = "57-68",
 year = "1974",
 URL = "http://www.nber.org/chapters/c3650",
}
@book{NBERtaub74-1,
 title = "Higher Education and Earnings: College as an Investment and Screening Device",
 author = "Paul J. Taubman and Terence Wales",
 institution = "National Bureau of Economic Research",
 type = "Book",
 publisher = "UMI",
 year = "1974",
 URL = "http://www.nber.org/books/taub74-1",
}