| 247 | Adventure Comics | 1st Appearance of Cosmic Boy; 1st Appearance of Cosmic Boy (Rokk Krinn); 1st appearance of Legion of Super-Heroes; 1st Appearance of Legion of Super-Heroes; 1st appearance of Lightning Lad; 1st Appearance of Lightning Lad (Garth Ranzz); 1st appearance of Saturn Girl; 1st Appearance of Saturn Girl (Imra Ardeen); Origin of Cosmic Boy (Rokk Krinn); Origin of Legion of Super-Heroes; Origin of Lightning Lad (Garth Ranzz); Origin of Saturn Girl (Imra Ardeen); Superboy joins team |
| 1 | Secrets of the Legion of Super-Heroes | Origin of the Legion of Super-Heroes; Origin of Cosmic Boy; Origin of Saturn Girl; Origin of Lightning Lad; Origin of Light Lass; Origin of Lightning Lord; Origin of Duo Damsel; Origin of Phantom Girl; Origin of Colossal Boy; Origin of Star Boy; Origin of Legion of Super-Heroes |
| 1/NS | Secrets of the Legion of Super-Heroes | Origin of Colossal Boy; Origin of Cosmic Boy; Origin of Duo Damsel; Origin of Legion of Super-Heroes; Origin of Light Lass; Origin of Lightning Lad; Origin of Lightning Lord; Origin of Phantom Girl; Origin of Saturn Girl; Origin of Star Boy; Origin of the Legion of Super-Heroes |
| 147 | Superboy (1st Series) | Reprints from Superboy (1st Series) #98, Adventure Comics #290, 293, Action Comics #276 and Superman (1st Series) #147; Origin of Cosmic Boy; Origin Of Lightning Lad; Origin of Saturn Girl; 80-Page Giant #G35; Giant-size; Origion Of Lightning Lad; Tales From The Legion Of Super-Heroes |
| 147-2 | Superboy (1st Series) | Origin of Cosmic Boy; Origin of Lightning Lad; Origin of Saturn Girl; Giant-size |