Title: Crisis on multiple Earths
Description: A collection of the annual 2-part collaboration issues which brought the Justice League of America and the Justice Society of America together to defend Earth. Originally published in 1971-74.
Subjects: Justice League of America (Fictitious characters), Good and evil, Life on other planets, Justice Society of America (Fictitious characters), Comic books, strips, Heroes, Fiction, Comics & graphic novels, superheroes