@inbook{NBERc2865,
 Crossref = "NBERunkn55-2",
 title = "The Nature and Uses of Interindustry-Relations Data and Methods",
 author = "W. Duane Evans and Marvin Hoffenberg",
 BookTitle = "Input-Output Analysis: An Appraisal",
 Publisher = "Princeton University Press",
 pages = "53-136",
 year = "1955",
 URL = "http://www.nber.org/chapters/c2865",
}
@book{NBERunkn55-2,
 title = "Input-Output Analysis: An Appraisal",
 author = "Conference on Research in Income and Wealth",
 institution = "National Bureau of Economic Research",
 type = "Book",
 publisher = "Princeton University Press",
 year = "1955",
 URL = "http://www.nber.org/books/unkn55-2",
}