GARG, H. P., K. R. RAO, and R. S. PAL. “Measurement of Global Solar Radiation on Inclined Surfaces of Any Orientation under Overcast Sky Condition”. MAUSAM 25, no. 2 (April 1, 1974): 295–300. Accessed November 23, 2024. http://103.215.208.102/index.php/MAUSAM/article/view/5207.