Croft Hallard T. <br/><br/>
Unsolved Problems in Geometry  Problem Books In Mathematics Unsolved Problems in Intutive Mathematics 
/ by Hallard T. Croft 
 - New York  Springer Verlag  1991 
 - 198p. 
<br/><br/><label>ISBN: </label>0387975063 
<br/><br/><label>Dewey Class. No.: </label>516  / CRO/U