Ah, the classic 80-Page Giants...
The stories: "Starro the Conqueror!"(B&B #28), "Case of the Stolen Super-Powers"(B&B #30), and "When Gravity Went Wild!"(JLA #5) by Gardner Fox, Mike Sekowsky, and Bernard Sachs.
Roll Call: Superman, Batman, Wonder Woman, Aquaman, Flash, Green Lantern, Martian Manhunter, Green Arrow
Notable Moments: When I first came across these all-reprint issues, I assumed they were placeholders in the regular series to give Fox, Sekowsky, et al, time to catch up. But closer examination reveals these 80-Page Giants came out the same month as one of the regular issues--kids got two issues of the JLA in one month! Sa-weet!