Logo design credit from Todd Klein via http://kleinletters.com/.
Sinestro gains his power ring.
1st Silver Age Green Lantern and Flash team up.
Showcase cover incorrectly attributed to Joe Giella; official pay records record Kane.
Index of Green Lantern appearances in Showcase (DC, 1955 series) #22-24 and Green Lantern (DC, 1960 series) #1-24.