Douglass, A. (1881). Ostrich farming in South Africa. Cassell, Peter, Galpin.
Lua i Stíl Chicago (17ú heag.)Douglass, Arthur. Ostrich Farming in South Africa. London: Cassell, Peter, Galpin, 1881.
Lua MLA (9ú heag.)Douglass, Arthur. Ostrich Farming in South Africa. Cassell, Peter, Galpin, 1881.
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