Appendix A: Sources of Data and Methods of Estimating Indicators of the Economic and Financial Characteristics of Agriculture

Donald C. Horton, Patterns of Farm Financial Structure: A Cross-Section View of Economic and Physical Determinants (Princeton University Press, 1957), https://www.nber.org/books-and-chapters/patterns-farm-financial-structure-cross-section-view-economic-and-physical-determinants/appendix-sources-data-and-methods-estimating-indicators-economic-and-financial-characteristics.