TY  - BOOK
AU  - Yaglom, A.M
AU  - Yaglom, I.M
TI  - Challenging mathematical problems with elementary solutions:vol-II: problems from various branches of mathematics
SN  - 0486655377
U1  - 511.6 
PY  - 1967///
CY  - New york
PB  - Dover Publications
ER  -