Complex sentence: Writer/editor Robert Kanigher supervised Wonder Woman's own series of stories called "Impossible Tales" which featured the same principle--there Wonder Woman appeared, along with her younger selves, Wonder Girl and Wonder Tot.
Split into simpler sentences: Writer/editor Robert Kanigher supervised Wonder Woman's own series of stories called "Impossible Tales" which featured the same principle. There, Wonder Woman appeared along with her younger selves, Wonder Girl and Wonder Tot.