TY  - BOOK
AU  - Ulam S M
TI  - Collection of mathematical problems
T2  - Interscience tracts in pure and applied mathematics; 8
U1  - Bx, K0 
PY  - 1960///
CY  - New York    
PB  -  Interscience        
KW  - Mathematics collections
N1  - Bibliography 145-150p
ER  -