Author : Dr. B. N. Gupta, Dr. R. K. Tiwary & Dr. Y. K. Mishra

Book Code : 2709

Language : English

ISBN : 978-81-960927-6-1

Author : Dr. S. K. Singh & Dr. Ajit Kumar

Book Code : 2663

Language : Hindi

ISBN : 978-93-5167-981-3

Author : Dr. S. K. Singh & Dr. Ajit Kumar

Book Code : 2664

Language : English

ISBN : 978-93-5167-982-0