Cartoon: "Mailbag"

From Author Wars - https://authorwars.com/books/cartoon-mailbag-2264386.html

Overview:

Title: Cartoon: "Mailbag"
Author: uncredited
Year: 1980
Type: Interior Art

Editions/Publications:

Unknown. Matrix, #28 (Unknown, uncredited, BSFA, 40 pages, A4, MAGAZINE)