@inbook{NBERc9678,
 Crossref = "NBERenge86-1",
 title = "New Estimates of Gross National Product, Canada, 1870-1926: Some Implications for Canadian Development ",
 author = "M C. Urquhart",
 BookTitle = "Long-Term Factors in American Economic Growth",
 Publisher = "University of Chicago Press",
 pages = "9-94",
 year = "1986",
 URL = "http://www.nber.org/chapters/c9678",
}
@book{NBERenge86-1,
 title = "Long-Term Factors in American Economic Growth",
 author = "Stanley L. Engerman and Robert E. Gallman",
 institution = "National Bureau of Economic Research",
 type = "Book",
 publisher = "University of Chicago Press",
 year = "1986",
 URL = "http://www.nber.org/books/enge86-1",
}