Bell, Robert J T .
Elementary treatise on coordinate geometry of three dimensions / Textual Documents Robert J T Bell. - 3 / . - Melbourne,London : MacMillan and Company Limited , 1960. - 444 : 506 ; .
516.06 / BEL/EL
Elementary treatise on coordinate geometry of three dimensions / Textual Documents Robert J T Bell. - 3 / . - Melbourne,London : MacMillan and Company Limited , 1960. - 444 : 506 ; .
516.06 / BEL/EL