TY  - BOOK
AU  - Pettofrezzo, Anthony J
AU  - Byrkit, Donald R
TI  - Elements of number theory
U1  - 511 
PY  - 1970///
CY  - London
PB  - Prentice Hall
KW  - theory of numbers
KW  - Number theory
KW  - Group theory
KW  - Algebra
KW  - Mathematics
KW  - Set theory
ER  -