Bell, Robert J. T.
Elementary treatise on coordinate geometry / - 3rd edn. / - London : Macmillan & Co ltd , 1988 - 377p,xlviii ;
B63:23 / H4,1
Elementary treatise on coordinate geometry / - 3rd edn. / - London : Macmillan & Co ltd , 1988 - 377p,xlviii ;
B63:23 / H4,1