TY  - BOOK
AU  - Ulam,Stanislaw M.
TI  - A collection of mathematical problems
T2  - Interscience tracts in pure and applied mathematics
AV  - QA43 U5
PY  - 1960///
CY  - New York
PB  - Interscience Publishers
KW  - Matemáticas
KW  - Problemas, ejercicios, etc
ER  -