Hassan H. The Measure of the Effectiveness of E - Learning by using Academic Scientific Materials which are Available on the Internet : Analytical and Descriptive Study in Al – Mustansiriya University According to (NOURI- NET ) System. CJ [Internet]. 2013 Jun. 30 [cited 2024 Nov. 23];(31). Available from: https://journal.cybrarians.info/index.php/cj/article/view/295