What magazine did Dr. Seuss write and do the cover art for?

Dr. Seuss did not write and do cover art for a specific magazine. He was a prolific author and illustrator who primarily wrote and illustrated children's books.

While he did contribute to other publications, like Redbook magazine, it was mainly as an illustrator, not a writer. His most famous contributions were in the realm of children's literature, with iconic books like "The Cat in the Hat" and "Green Eggs and Ham."