Justice League of America No.123 "Where on Earth Am I?"
Justice League of America No.124 "The Avenging Ghosts of The Justice Society."

I first came across this adventure when it was printed here in Australia as the final story inWonder Woman Album no.2!
At times JLA/JSA team-ups appeared in strange titles in Australia.  (I remember first coming across the Earth-Three/Crime Syndicate story in a Giant Flash Album as well.)  I enjoyed it immensely - probably the art, and I enjoyed the choice of JSA members.  As I was just a young kid it was probably my first encounter of the adult Earth-2 Robin.

The cover scan of the Swedish edition of this comic was sent to me by Edvin Sandberg.  He has a magnificant web page on the Swedish DC comic Gigant, click on the scan to go to his site.