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Prof. S.K. Jain holds a doctorate degree in mathematics. He is widely known for his research work, and academic achievements. He retired as an Associate Professor. The research career of Dr. S.K. Jain span a period off nearly 25 years which saw rapid developments in varioius aspects of modern mathematics. Dr. Jain has played a significant role in these developments.

Shri R.C. Verma, born on 6th December, 1945, the author of this book, has earlier written another book title Indian Tribes Through the Ages which was first published in January, 1990 by the Publications Division of the Ministry of information and Broadcasting, Government of India. The book has received overwhelming response from the cross sections of the readers and has been ppublished in three more languages Hindi, Gujarati and Marathi by the Publications Division. Shri Verma joined the Indian Revenue Service in 1968 and served the Govt. with distinction in variety of positions both within and outside the Deptt. In 1993, he was awarded a ‘Certificate of Appreciation’ by the Department of Justice, Government of the U.S.A. for his outstanding contributions in the Enforcement of Narcotic Drug Laws. In 1996, he was awarded the rare honour of the ‘President’s Certificate of Appreciation’ for Specially Distinguished Record of Service’ on the occasion of the Republic Day of India. Protesting against increasing influence of tax evaders over administration, corruption and bad governance which made it difficult for an honest officer to carry on his official functions fearlessly and honestly, he has now, therefore wought voluntary retirement from service, in order to serve the country more effectively for the cause of social-economic justice, protection of human rights, good governance and empowerment of the people.

Dr. Pratap Singh did his M.E. (Farm Machinery) from Indian Institute of Technology, Kharagpur, West Bengal during the year 1975. He obtained his Ph.D. degree from Mohan Lal Sukhadia University, Udaipur during 1986. He is recipient of prestigious Jawahar Lal Nehru award and also honoured with Gold Medal by Dr. K.N. Nag in Indian society of Agricultural Engineering. Dr. Singh started his career as Assistant Professor in the field of Farm Machinery and Power Engineering at University of Udaipur. During his service career he has worked on different positions including Head, Department of Farm Machinery and power Engineering and Dean, college of Technology and Agricultural Engineering, Udaipur. At present Dr. Singh is Director of Research, Maharana Pratap University of Agriculture and Technology, Udaipur. Dr. Singh has published more than 100 research papers in various journals and magazines of national and international repute. He is the recipient of R.K. Jain Memorial Award of Indian society of Agricultural Engineers for outstanding work in the field of Farm Machinery and Power Engineering. He is also Fellow of Institution of Engineers and Indian Society of Agriculture Engineers. Dr. Singh has also held the post of Present, Rajasthan Chapter ISAE (1992-1995). He has also written a book entitled Agriculture Development in Rajasthan.