Stephen Barr
Books
Mathematical Brain Benders
1982
ISBN 9780486242606
Science Fiction Gems, Volume Eleven, Rog Phillips and Others
2016
ISBN 9781612873237
The Science Fiction Omnibus #2 (Serapis Classics)
2017
ISBN 9783963130953
The Upside Down Hat
2022
ISBN 9781797208794- No cover
Ciencia ficción, selección 12
1974
ISBN 9788402038968 
The Magazine of Fantasy and Science Fiction, June 1971