@inbook{NBERc5916,
 Crossref = "NBERtost54-1",
 title = "Appendix C: Methods of Estimating the Value of Farm Implements and Machinery, 1935 and 1950",
 author = "Alvin S. Tostlebe",
 BookTitle = "The Growth of Physical Capital in Agriculture, 1870-1950",
 Publisher = "NBER",
 pages = "81-82",
 year = "1954",
 URL = "http://www.nber.org/chapters/c5916",
}
@book{NBERtost54-1,
 title = "The Growth of Physical Capital in Agriculture, 1870-1950",
 author = "Alvin S. Tostlebe",
 institution = "National Bureau of Economic Research",
 type = "Book",
 publisher = "NBER",
 year = "1954",
 URL = "http://www.nber.org/books/tost54-1",
}