[1]Timmer，C. Peter. 1984. A World Without Agriculture: The Structural Transformation in Historical Perspective.American:American
Enterprise Institute.
[2]Clark，Colin. 1940. The Conditions of Economic Progress.London: Macmillan.
[3]Hayami，Y.，and V. Ruttan. 1985. Agricultural Development:An International Perspective.Revised and expanded edition. Baltimore:Johns Hopkins University Press.
[4]Theodore W. Schultz. 1953. Economic Organization of Agriculture. New York: McGraw-Hill Book Company Inc.
