- Script
- Steve Englehart
- Pencils
- Murphy Anderson
- Inks
- Murphy Anderson
- Colors
- Jerry Serpe
- Letters
- Ben Oda
- Job Number
- S-3090
- Genre
- superhero; horror-suspense
- Characters
- Superman; Swamp Thing; Solomon Grundy (villain); Lois Lane; Dr. Jenet Klyburn
- Reprints
Credits for script, pencils and inks confirmed from Julius Schwartz's editorial records, provided by DC Comics.
- Script
- ?
- Letters
- typeset
- Job Number
- S-3095
Letters from Beppe Sabatini, Jacob Butcher, and Robert Sallion.