David Anthony Kraft’s Comics Interview 96 (1991)
This issue of Comics Interview features a great interview with artist, Charles Vess. As you’re probably aware, Vess painted a number of Swamp Thing covers. Unfortunately, Swamp Thing isn’t mentioned in the interview but he does make an appearance by way of a commission.
The commission has appeared in a few different publications, including, Modern Masters, Vol 11: Charles Vess and Tundra Sketchbooks 5: Charles Vess. Both books feature initial concept sketches as well as the finished commission.