TY  - BOOK
AU  - Courant, Richard.
AU  - Robbins, Herbert.
TI  - What is mathematics : : elementary approach to ideas and methods 
SN  - 195105192
U1  - 511.2  2
PY  - 1996///
CY  - New York
PB  - Oxford University Press
KW  - The number system of mathematics
KW  - Geometrical constructions
KW  - Topology
ER  -