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Чикаго-гийн эшлэл (17 дахь хэвлэлт)el-hefny, amina. Forecasting for Management of Seasonal Goods Inventories. cairo: National Planning Institute, 1964.
MLA -ийн эшлэл (9 дэх хэвлэлт)el-hefny, amina. Forecasting for Management of Seasonal Goods Inventories. National Planning Institute, 1964.