29 Jun Two Hidden Sources of Productivity Growth in American Agriculture, 1860-1930
“Two Hidden Sources of Productivity Growth in American Agriculture, 1860-1930” (with William N. Parker) Agricultural History 56, October 1982, pp. 648-62
“Two Hidden Sources of Productivity Growth in American Agriculture, 1860-1930” (with William N. Parker) Agricultural History 56, October 1982, pp. 648-62
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