TY  - BOOK
AU  - Guy, Richard K.
AU  - 
TI  - Unsolved problems in number theory
T2  - Problem books in Mathematics
SN  - 0387942890
U1  - 512.7 
PY  - 1981///
CY  - New York
PB  - Springer-Verlag
N1  - "Lib. also has 2nd edn. (1994)"
ER  -