@inbook{NBERc2629,
 Crossref = "NBERlong58-1",
 title = "Appendix A: The Labor Force and Population by Sex and Age Group, Decennial Enumerations",
 author = "Clarence D. Long",
 BookTitle = "The Labor Force Under Changing Income and Employment",
 Publisher = "Princeton University Press",
 pages = "283-315",
 year = "1958",
 URL = "http://www.nber.org/chapters/c2629",
}
@book{NBERlong58-1,
 title = "The Labor Force Under Changing Income and Employment",
 author = "Clarence D. Long",
 institution = "National Bureau of Economic Research",
 type = "Book",
 publisher = "Princeton University Press",
 year = "1958",
 URL = "http://www.nber.org/books/long58-1",
}