TY  - BOOK
AU  - Andreescu, Titu  .
TI  - Mathematical olympiad challenges / 
SN  - 978-81-8128-323-8
U1  - B 
PY  - 2004///
CY  - New Delhi : 
PB  - Springer (India) Pvt. Ltd. , 
KW  - Mathematics- Problems, exercises, etc
ER  -