Justice League of America, Vol. 1 #139 (1976)

The Cosmic Conspiracy Against Adam Strange / The Ice Age Cometh
Returning from Rann by Zeta Beam, several of the Leaguers are shifted into a separate dimension where they are able to see their colleagues but they cannot be seen themselves. Adam Strange joins them and can see both groups and tells them that Kanjar Ro is behind their troubles.The League travel to Ro's location - the 73rd Century where they had previously helped Strange. There the League are attacked by soldiers of the 73rd Century and, after some setbacks, manage to defeat them. Strange discovers Kanjar Ro had been masquerading as a Green Lantern throughout the battle and captures him.
Release Date: 1976