“EXPERIMENTAL STUDY THE EFFECT OF ABSORBING TUBE DIAMETER ON THE PERFORMANCE OF COMPOUND PARABOLIC CONCENTRATOR SOLAR COLLECTOR”. Journal of Engineering and Sustainable Development 22, no. 4 (July 1, 2018): 247–255. Accessed April 28, 2024. https://jeasd.uomustansiriyah.edu.iq/index.php/jeasd/article/view/455.