Threads of time : three original novellas of science fiction /
Silverberg, Robert.
Benford, Gregory,1941-Threads of time.
Simak, Clifford D.,1904-1988.Marathon photograph.
Spinrad, Norman.Riding the torch.
[London] Fontana
1977
This collection originally published: Nashville : T. Nelson, 1974 ; London : Millington, 1975
Contents: Threads of time / by Gregory Benford - The Marathon photograph / by Clifford D. Simak - Riding the torch / by Norman Spinrad