Tarzan and N'kima waiting out rain in a cave (painting). Cover pencil, ink, & color credits from Ken Webber (December 17, 2003).
In my opinion this is clearly a Gollub cover. The muscle parterns on Tazan, The modeling with tones ranging from white to black, all point to Morris Gollub. Also the unique way he represented rain. He told a close friend that he used a razor blade to create this effect. Compare Lassie No 25 where he uses the same tenique.