1. Contemporary Cultures and Societies of Latin America edited by Dwight B. Heath and Richard N. Adams (New York: Random House, 1965) contains enlightening chapters on sierra haciendas.
2. Toward an Integrated Theory of Development by William F. Whyte and Lawrence K. Williams (Ithaca: New York State School of Industrial and Labor Relations, 1968) is an examination of the interrelations of economic and noneconomic factors in rural development with special reference to Peru.