1. Ananthakrishnan , R. Acharya , U. R. Ramakrishnan , A. R. 1967 On the criteria for declaring the onset of the southwest monsoon over Kerala IMD Forecasting Manual
2. Ananthakrishnan , R. Srinivasan , V. Ramakrishnan , A. R. Jambunathan , R. 1968 Synoptic features associated with the onset of the southwest monsoon over Kerala IMD Forecasting Manyal, No. IV-18.2
3. Troughs of low pressure over the Gangetic valley during the southwest monsoon season and its implications-A suggested new approach;Desai;Ind. Jour. Met. and Geophys.,1967
4. A complex intertropical convergence zone-Some examples from the Indian Ocean;Hobbs;Weather,1974
5. India Meteorological Dept. (IMD) 1943 Climatological atlas for airmen 3