The Growth of physical capital in Agriculture, 1870-1950 - Tostlebe, Alvin Samuel n. 1894 (New York, New York : National Bureau of Economic Research, 1954)
"National Bureau of Economic Research Occasional Paper 44"
Bibliografia: al pie de algs. paginas
Keywords: ESTADOS UNIDOS -- CONDICIONES ECONOMICAS; AGRICULTURA -- ASPECTOS ECONOMICOS - ESTADOS UNIDOS