Richards, A. (1982). Egypt's agricultural development, 1800-1980: Technical and social change. Westview Press.
Lua i Stíl Chicago (17ú heag.)Richards, Alan. Egypt's Agricultural Development, 1800-1980: Technical and Social Change. Boulder, Colo.: Westview Press, 1982.
Lua MLA (9ú heag.)Richards, Alan. Egypt's Agricultural Development, 1800-1980: Technical and Social Change. Westview Press, 1982.
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