@inbook{NBERc0384,
 Crossref = "NBERburn54-1",
 title = "Stepping Stones towards the Future",
 author = "Arthur F. Burns",
 BookTitle = "The Frontiers of Economic Knowledge",
 Publisher = "Princeton University Press",
 pages = "26-45",
 year = "1954",
 URL = "http://www.nber.org/chapters/c0384",
}
@book{NBERburn54-1,
 title = "The Frontiers of Economic Knowledge",
 author = "Arthur F. Burns",
 institution = "National Bureau of Economic Research",
 type = "Book",
 publisher = "Princeton University Press",
 year = "1954",
 URL = "http://www.nber.org/books/burn54-1",
}