Gupta, Arbind Meri das ungaliyan: vigyan ke vichar aur gatividhiyan / Arbind Gupta - New Delhi : National Book Trust , India, 2019. - 118 p. : Ill. ; 23 cm. - Srajnatmak siksha . ISBN: 9788123732039 Subjects--Topical Terms: Science- Education Education-Recreation Dewey Class. No.: 500 / GUP/M