1. Bureau of Statistics 1940–1967: Transfers of Rural Immovable Property, Government Printer, Pretoria
2. Hoover, D. M. 1961. A study of land prides in the U.S. Unpublished Ph.D. Thesis, University of Chicago
3. Bureau of Statistics. 1938–1967. Reports on Agricultural and Pastoral Production 1936–37, to 1938–39 and 1945–46 to 1962–63. Agricultural Census Reports Nos. 17 to 37. Government Printer, Pretoria