KAUFMANN, W. J. (1973). Relativity and cosmology. Harper and Row Pub.
Chicago-čujuhus (17. p.)KAUFMANN, Williuam J. Relativity and Cosmology. New York: Harper and Row Pub, 1973.
MLA-čujuhus (9. p.)KAUFMANN, Williuam J. Relativity and Cosmology. Harper and Row Pub, 1973.
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