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GOYAL J. K., GUPTA K. P., . (1998). THEORY OF RELATIVITY. MEERUT: KRISHNA PRAKASHAN MANDIR.
GOYAL J K, GUPTA K P, . 1998. THEORY OF RELATIVITY. MEERUT: KRISHNA PRAKASHAN MANDIR.
GOYAL J K, GUPTA K P, . THEORY OF RELATIVITY. MEERUT: KRISHNA PRAKASHAN MANDIR. 1998.
