Prachin Bharat Ke Vaigyanik Karandhar

Ancient Indian Inventors and their inventions in Hindi Medium. It includes details about Indian Mathematicians, Astrologers and their works. The book is approved by Education ministry and being published since 1967, The author Swami Satyaprakash Saraswati (M Sc, D Sc, Ex professor Allahabad University) is renowned for his works.