Para que serve uma adaga de vidro

From Author Wars - https://authorwars.com/books/para-que-serve-uma-adaga-de-vidro-2887456.html

Overview:

Title: Para que serve uma adaga de vidro
Author: Larry Niven
Year: 1990
Type: Short Fiction

Editions/Publications:

Unknown. Magos (Unknown, Larry Niven, Melhoramentos, ISBN-10: 8528902021, 332 pages, Paperback, Anthology)