ديبة جابر, and بربهان سلمان. “Improve the Performance Coefficient of a Heat Pump Soil_Water))Operating on the Principle of”. Tishreen University Journal -Engineering Sciences Series 43, no. 2 (May 17, 2021). Accessed April 30, 2024. https://journal.tishreen.edu.sy/index.php/engscnc/article/view/10572.