Notes:
The Original Swamp Thing Saga is featured in issues #2, 14, 17, and 20.
On-sale date from the Catalog of Copyright Entries, Periodicals, 1977. Date given as June 23 in DC Coming Attractions vol. 2 #7 and in house ads in Justice League of America #145 and Super-Team Family #12. Date given as June 21 in Comic Reader #144.