उपेन्द्रविज्ञानसूत्रम्- Upendra Vigyan Sutram by Shri Upendradatta Pandey (An Old Book)

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उपेन्द्रविज्ञानसूत्रम् - Upendra Vigyan Sutram by Shri Upendradatta Pandey (An Old Book) - Mangal Dev Shastri - A treatise on scientific principles and their metaphysical interpretations.