Historicity of Ramayan

Vedic foundation of Homeopathy

Shaka and Samvatsara

Science of Tantra and Mahavidya

Frontiers of Science by Vedas

Vedic View of Sri Jagannath

Concept of Tīrthankara -Arun Kumar Upadhyay, IPS B-9, CB-9, Cantonment

Rigveda

Indian Astronomy

Indian Astronomy-a sourcebook

Brahma-Sphuta-Siddhanta-3

Kadambini

Siddhānta-Śiromaṇi (sanskrit)

Chakra Mahavijnan

Brihadaranyaka Upanishad

Siddhānta-Darpaṇa of Nīlakaṇṭha

Bharatiya Jyotish Sastra-2

Siddhanta-tattva-vivek

Sphuṭa-chandrāpti by Mādhava

Chaturvarnya-Samskriti-Vimarshah