Croft, Hallard T. and Others <br/><br/>
Unsolved problems in geometry   
By Hallard T. Croft, Kenneth J. Falconer and Richard K. Guy 
 - New York  Springer-Verlag  1991 
 - xv, 198p. Index 
 - Problem books in Mathematics Unsolved problems in Intuitive Mathematics   v.2 .
<br/><br/>  
<br/><br/><label>Dewey Class. No.: </label>516  / C941.UP