Singh Nagendra Kumar Vigyapan aur vigyapan agency Sanrachna evam karya pranali - Delhi Shivalik Prakashan 2019 - 489p. cm. ISBN: INR 1595.00 Standard No.: 141864 Source: 00021, 24/01/2020, Kiran Book Service Textual Subjects--Topical Terms: Hindi Dewey Class. No.: 4:(X:513), Q9