el tigi, a. e. d. (1964). determining investment priority ratings. the institute of national planning.
Chicago-viite (17. p.)el tigi, aziz el din. Determining Investment Priority Ratings. cairo: the institute of national planning, 1964.
MLA-viite (9. p.)el tigi, aziz el din. Determining Investment Priority Ratings. the institute of national planning, 1964.
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