Petra

From Author Wars - https://authorwars.com/books/petra-1474444.html

Overview:

Title: Petra
Author: Greg Bear
Year: 1988
Type: Short Fiction

Editions/Publications:

Unknown. Spiegelschatten (Unknown, Greg Bear, Heyne, ISBN-10: 3453031334, DM 12.80, 432 pages, Paperback, Anthology)