|   | by Richard K. GuyHardcover 
 
 
 ISBN: 978-0-387-90593-8 ISBN-10: 0-387-90593-6 Springer-Verlag · 1981 | 
| See also: | ||
| 2004 | Hardcover | Unsolved Problems in Number Theory (Problem Books in Mathematics) | 
| 1994 | Hardcover | Unsolved Problems in Number Theory (Unsolved Problems in Intuitive Mathematics) (v. 1) | 
| 1981 | Gebundene Ausgabe | Unsolved Problems in Number Theory |