Author's Note (Ringworld)

From Author Wars - https://authorwars.com/books/authors-note-ringworld-1080475.html

Overview:

Title: Author's Note (Ringworld)
Author: Larry Niven
Year: 1977
Type: Essays

Editions/Publications:

Unknown. Ringworld (Unknown, Larry Niven, Holt, Rinehart and Winston / SFBC, $3.98, vi+313 pages, Hardcover, Novel)
Unknown. Ringworld (Unknown, Larry Niven, Holt, Rinehart and Winston, ISBN-10: 0030206561, $8.95, [2]+342 pages, Hardcover, Novel)