Thread:Shadzane/@comment-33620403-20180624154926

What I'm gonna ask might date a bit, but on the issue, you added this a few years ago:

This issue of Adventure Comics'' is considered by some comic indexers to be the first issue to regularly feature the Green Arrow of Earth-One. Other indexers place the dividing line between Earth-Two and Earth-One elsewhere. The DC Comics Database has selected thus issue.''

Do you, by any chance, remember the source of the indexers using #218 as a reference ? 