Whose Brother Is My Sister?

From Author Wars - https://authorwars.com/books/whose-brother-is-my-sister-60392.html

Overview:

Title: Whose Brother Is My Sister?
Author: Simon Tully
Year: 1967
Type: Short Fiction

Variant Titles:

1973. De qui ma sœur est-elle le frère ?

Editions/Publications:

Unknown. Worlds of Tomorrow, May 1967 (Unknown, Simon Tully, Galaxy Publishing Corp., $0.50, 164 pages, digest, MAGAZINE)