"Desenvolupament rural." . . . . . . . "The polítics of agriculture : soil conservation and the struggle for power in rural America" . . . "The Politics of Agriculture; Soil Conservation and the Struggle for Power in Rural America" . . . . . "The politics of agriculture; soil conservation and the struggle for power in rural America" . . "The interests; The process of policy formation; Recommendations and general interpretations." . "The politics of agriculture soil conservation and the struggle for power in Rural America" . . "The politics of agriculture : soil conservation and the struggle for power in rural America" . . . . . . . . . . . "The politics of agriculture soil conservation and the struggle for power in rural America"@en . "The Politics of Agriculture. Soil conservation and the struggle for power in rural America"@en . "The politics of agriculture ; soil conservation and the struggle for power in rural America" . . . . . "The politics of agriculture : Soil conservation and the struggle for power in rural America" . "The politics of agriculture : soil conservation and the struggle for power in rural America / Charles M. Hardin"@en . . "The Politics of agriculture" . "Política agrícola." . . "Sols Conservation." . . "Agriculture Aspect économique États-Unis." . .