Effects of aerosols on the solar radiation in mid-hill of Nepal: a case study in the Kathmandu Valley. - M. K. Thapa; B. K. Bhattarai; S. Gurung; B. K. Sapkota; Khem N. Poudyal; Naba Raj Karki (Int. J. Syst. Assur. Eng. Manag., 2017)