qayum, a. (1964). an extension of black's optimum savings model. the institute of national planning.
Lua i Stíl Chicago (17ú heag.)qayum, a. An Extension of Black's Optimum Savings Model. cairo: the institute of national planning, 1964.
Lua MLA (9ú heag.)qayum, a. An Extension of Black's Optimum Savings Model. the institute of national planning, 1964.
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