“The Effect of Using a Paraffin Wax-Aluminum Chip Compound As Thermal Storage Materials in a Solar Air Heater”. Journal of Al-Rafidain University College For Sciences ( Print ISSN: 1681-6870 ,Online ISSN: 2790-2293 ), vol. 34, no. 2, Oct. 2021, pp. 259-84, https://doi.org/10.55562/jrucs.v34i2.297.