A. Al-Hemiri, Adel, and Ahmed Deaa Nasiaf. “THE USE of DIRECT SOLAR ENERGY in ABSORPTION REFREGERATION EMPLOYING NH3 – H2O SYSTEM”. Iraqi Journal of Chemical and Petroleum Engineering, vol. 11, no. 4, Dec. 2010, pp. 13-21, https://doi.org/10.31699/IJCPE.2010.4.2.