el tigi, a. e. d. (1964). determining investment priority ratings. the institute of national planning.
Tohutoru Kātū Chicago (17th ed.)el tigi, aziz el din. Determining Investment Priority Ratings. cairo: the institute of national planning, 1964.
Tohutoro MLA (9th ed.)el tigi, aziz el din. Determining Investment Priority Ratings. the institute of national planning, 1964.
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