Chellappa, R. “Frequency of First Occurrence of Monsoon Depression in the Bay of Bengal in 10-Day Epochs During the Period 1891-1970”. MAUSAM 28, no. 2 (April 1, 1977): 251–252. Accessed September 19, 2024. http://103.215.208.102/index.php/MAUSAM/article/view/2696.