Nibal Al-Murad dr., Al-Mullah Hasan M. 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. TANRA [Internet]. 2009 Jun. 1 [cited 2025 Sep. 10];31(94):34-53. Available from: https://edusj.uomosul.edu.iq/index.php/tanmiyat/article/view/30120