TY  - BOOK
AU  - Singer
AU  - Nagy
TI  - Enigma numerelor
SN  - 973-9077-13-7
PY  - 1995///
CY  - Bucureşti
PB  - Sigma
KW  - Matematică -- Teste
KW  - 51(079)(075.3)cl.3=135.1
ER  -