@inbook{NBERc1448,
 Crossref = "NBERkuzn61-1",
 title = "Trends in Financing of Capital Formation: Share of Internal Funds",
 author = "Simon Kuznets and Elizabeth Jenks",
 pages = "220-271",
 year = "1961",
 URL = "http://www.nber.org/chapters/c1448",
}