Bell, R. J. T. (1944). An elementary treatise on co-ordinate geometry of three: Dimensions. Macmillan.
Chicago-čujuhus (17. p.)Bell, Robert J. T. An Elementary Treatise on Co-ordinate Geometry of Three: Dimensions. New Delhi: Macmillan, 1944.
MLA-čujuhus (9. p.)Bell, Robert J. T. An Elementary Treatise on Co-ordinate Geometry of Three: Dimensions. Macmillan, 1944.
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