Letter (Worlds of If, June 1967)

From Author Wars - https://authorwars.com/books/letter-worlds-of-if-june-1967-1674306.html

Overview:

Title: Letter (Worlds of If, June 1967)
Author: Arthur C. Clarke
Year: 1967
Type: Essays
Series: Letters: Arthur C. Clarke

Editions/Publications:

Unknown. If, June 1967 (Unknown, Arthur C. Clarke, Galaxy Publishing Corporation, $0.50, 164 pages, digest, MAGAZINE)