This is book is a translation from Dutch of the original title Bolland: Een Roman van Gekromde Ruimten en Uitdijend Heelal (1957).
The following English translation is known:
| Year | Title | Notes |
|---|---|---|
| 1965 | Sphereland: A Fantasy About Curved Spaces and an Expanding Universe | Translated by Cornelie J. Rheinboldt |
In addition to its stand-alone volume, this title was published in the follow book. It can be rated independently of any volume containing it.
