Don has sold a LOT of cartoons in his career. Each numbered cartoon or illustration on the left side of this Blog is from a DIFFERENT magazine, newspaper, etc. Let's see if we can find out the total number of publications (places) where Don's work has appeared . . . . . (An unnumbered posting is a duplicate publication.)
68. Official Detective, May 1971
As for TD Publishing, we suspect the "TD" stands for True Detective, which takes us back to Macfadden Publications, and that explains the common bond several of Don's printed cartoons have--the magazine title in the upper right or left hand corner.