Gupta, D. B. (1982). A Base book for viva-voce in mathematics: (post graduate classes). Kedar Nath Ram Nath.
Chicago-viite (17. p.)Gupta, Dr. B.D. A Base Book for Viva-voce in Mathematics: (post Graduate Classes). Meerut: Kedar Nath Ram Nath, 1982.
MLA-viite (9. p.)Gupta, Dr. B.D. A Base Book for Viva-voce in Mathematics: (post Graduate Classes). Kedar Nath Ram Nath, 1982.
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