Kendriye Avam Rajye Civil Sewa Pariksaho Ke Chapterwise Topicwise Hal Prashan Patre (1990-2022) Bharat Ayum Vishav Ka Bhoogol Hindi By Rajesh Kumar Singh Ravi Shankar Sinha , Sanjeet Kumar(Paperback, Hindi, Rajesh Kumar Singh Ravi Shankar Sinha, Sanjeet Kumar)