Elshafei, A. (1969). Numerical Control Series Post Processors. The Institute of National Planning.
Lua i Stíl Chicago (17ú heag.)Elshafei, Alwalid. Numerical Control Series Post Processors. Cairo: The Institute of National Planning, 1969.
Lua MLA (9ú heag.)Elshafei, Alwalid. Numerical Control Series Post Processors. The Institute of National Planning, 1969.
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