Appendix B. Extension of the Bureau of Agricultural Economics Index of Prices Paid by Farmers for Machinery and, Beginning with 1920, Expansion of the Coverage to Include Motor Vehicles with Other Farm MachineryAlvin S. Tostlebe
Chapter in NBER book The Growth of Physical Capital in Agriculture, 1870-1950 (1954), Alvin S. Tostlebe (p. 79 - 80) This paper is available as PDF (37 K) or via email.
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