Najm , Ali, Itimad Dawood Jumaah, and Abdul Mun'em A. Karim. “Effect of Using A Double Coil Tube With Modified Pitch on The Overall Heat Transfer Rate”. Diyala Journal of Engineering Sciences 15, no. 1 (March 15, 2022): 40–53. Accessed July 7, 2024. https://mail.djes.info/index.php/djes/article/view/934.