@inbook{NBERc8005,
 Crossref = "NBERgall92-1",
 title = "Front matter, American Economic Growth and Standards of Living before the Civil War",
 author = "Robert E. Gallman and John Joseph Wallis",
 BookTitle = "American Economic Growth and Standards of Living before the Civil War",
 Publisher = "University of Chicago Press",
 year = "1992",
 month = "January",
 URL = "http://www.nber.org/chapters/c8005",
}
@book{NBERgall92-1,
 title = "American Economic Growth and Standards of Living before the Civil War",
 author = "Robert E. Gallman and John Joseph Wallis",
 institution = "National Bureau of Economic Research",
 type = "Book",
 publisher = "University of Chicago Press",
 year = "1992",
 URL = "http://www.nber.org/books/gall92-1",
}