Maneesh KAUSHAL และ Varun GOEL. (2014) Effective Efficiency of Solar Air Heaters of Different Types of Roughness Geometries over Absorber Plate. <i>Walailak Journal of Science and Technology</i>, <i>11</i>(9), 729.Maneesh KAUSHAL และ Varun GOEL. "Effective Efficiency of Solar Air Heaters of Different Types of Roughness Geometries over Absorber Plate". Walailak Journal of Science and Technology 11 (2014):729.Maneesh KAUSHAL และ Varun GOEL. Effective Efficiency of Solar Air Heaters of Different Types of Roughness Geometries over Absorber Plate. Walailak University:ม.ป.ท. 2014.