TY  - BOOK
AU  - Croft, Hallard T.
AU  - Falconer, Kenneth J. Guy, Richard K.
TI  - Unsolved problems in geometry
T2  - Problem book in mathematics Unsolved problems in intuitive mathematics
SN  - 0387975063
U1  - 516 
PY  - 1991///
CY  - New York
PB  - Springer-Verlag
ER  -