The DDTs

From Author Wars - https://authorwars.com/books/the-ddts-596553.html

Overview:

Title: The DDTs
Author: Ejler Jakobsson
Year: 1970
Type: Essays
Series: Editor's Page (Galaxy)

Editions/Publications:

Unknown. Galaxy Magazine, May 1970 (Unknown, Ejler Jakobsson, Universal Publishing & Distributing Corporation, $0.60, 164 pages, digest, MAGAZINE)
Unknown. Galaxy Science Fiction [UK], June 1970 (Unknown, Ejler Jakobsson, Universal-Tandem Publishing Company Ltd., 5/-, 164 pages, digest, MAGAZINE)