Yo, yo y siempre yo

From Author Wars - https://authorwars.com/books/yo-yo-y-siempre-yo-2483838.html

Overview:

Title: Yo, yo y siempre yo
Author: William Tenn
Year: 1961
Type: Short Fiction

Editions/Publications:

Unknown. Mundos Posibles (Unknown, William Tenn, E.D.H.A.S.A., 238 pages, Paperback, Collection)
Unknown. Mundos Posibles (Unknown, William Tenn, E.D.H.A.S.A., 217 pages, Trade Paperback, Collection)