Ringworld Retrospective

From Author Wars - https://authorwars.com/books/ringworld-retrospective-124034.html

Overview:

Title: Ringworld Retrospective
Author: Larry Niven
Year: 1989
Type: Essays

Editions/Publications:

Unknown. The Best of the Nebulas (Unknown, Larry Niven, Tor, ISBN-10: 0312931840, $19.95, 593 pages, Hardcover, Anthology)
Unknown. The Best of the Nebulas (Unknown, Larry Niven, Tor, ISBN-10: 0312931751, $14.95, 593 pages, Trade Paperback, Anthology)