Lauck, J. (2000). American agriculture and the problem of monopoly: The political economy of grain belt farming, 1953-1980. University of Nebraska Press.
Dyfyniad Arddull ChicagoLauck, Jon. American Agriculture and the Problem of Monopoly: The Political Economy of Grain Belt Farming, 1953-1980. Lincoln: University of Nebraska Press, 2000.
Dyfyniad MLALauck, Jon. American Agriculture and the Problem of Monopoly: The Political Economy of Grain Belt Farming, 1953-1980. University of Nebraska Press, 2000.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.