TY  - BOOK
AU  - Yaglom A M
AU  -  McCawley Tr.
AU  -  Yaglom I M
TI  - Challenging mathematical problems with elementary solutions
T2  - Holden day series in mathematics
U1  - By1, K4.1-.2 
PY  - 1964///
CY  - San Francisco 
PB  - Fransisco Holdenday        
KW  - Mathematical collections
ER  -