The author of the above presentation is Thotalam Chellaswami (date of birth 31th July 1925), the holder of master s degree in mathematics (Madras University) and in Economics (Punjab University) and Statistician s Diploma (Indian Statistical Institute). He is a retired senior officer of Indian Economic Service (Assistant Economic Advisor to Govt. of India) and Senior Advisor of the United Nations (ILO). He founded in 1985 Srinivasa Gita Satsangh Trust (a charitable and Cultural Trust) in honour of his father, Late and revered Thotalam Srinivasachari with himself as Founder Trustee. The Trust has been duly registered in 1985.