Nibal Al-Murad, dr., and Mohammed Al-Mullah Hasan. 2009. “The Role of Marketing Mix Elements in Marketing the Information to the Beneficiaries An Investigation Study for Central Library (Mosul University) and Technical Institution Library”. TANMIYAT AL-RAFIDAIN 31 (94):34-53. https://doi.org/10.33899/tanra.2009.161811.