
- Author: Praveen Kumar Rai (editor)
- Language: English
- Year: 2023

- Author: Praveen Kumar Rai
- Language: English
- Year: 2023

- Author: Praveen Kumar Rai
- Language: English
- Year: 2023

- Author: Prafull Singh Varun Narayan Mishra Praveen Kumar Rai
- Language: English
- Year: 2021