Horton, S. R., & Horton, D. E. (1973). Sources for the investigation of Peruvian agrarian history. Land Tenure Center, University of Wisconsin.

Horton, Susan Ramírez, and Douglas Earl Horton. Sources for the Investigation of Peruvian Agrarian History. Madison, Wisconsin: Land Tenure Center, University of Wisconsin, 1973.

Horton, Susan Ramírez, and Douglas Earl Horton. Sources for the Investigation of Peruvian Agrarian History. Land Tenure Center, University of Wisconsin, 1973.