- Pencils
- Curt Swan (credited)
- Inks
- George Klein (credited)
- Letters
- Ira Schnapp
- Genre
- superhero
- Characters
- Legion of Super-Heroes [Lightning Lad; Saturn Girl; Superboy]
- Reprints
The cover reprinted is the one from Adventure Comics #332, but it says #344 on it instead of #332.
- Pencils
- Curt Swan (credited)
- Inks
- George Klein (credited)
- Letters
- Joe Letterese
- Genre
- superhero
- Characters
- Legion of Super-Heroes [Brainiac 5; Chameleon Boy; Phantom Girl; Lightning Lad; Colossal Boy; Star Boy; Saturn Girl; Superboy; Mon-El]; Beast Boy
- Reprints
Missing issue number, month, and price on reprint of the cover in this volume.
- Script
- ?
- Pencils
- Curt Swan (credited) (reprint art, p. 1-4); Al Plastino (credited) (new art, p. 5-6)
- Inks
- George Klein (credited) (reprint art, p. 1-4); Al Plastino (credited) (new art, p. 5-6)
- Letters
- ?
- Genre
- superhero
- Characters
- Phantom Girl; Duo Damsel; Brainiac 5; Lightning Lad; Bouncing Boy; Invisible Kid; Shrinking Violet; Cosmic Boy; Chameleon Boy; Saturn Girl; Colossal Boy; Sun Boy; Superboy; Light Lass; Star Boy; Mon-El; Ultra Boy; Matter-Eater Lad; Supergirl; Element Lad; Elastic Lad [Jimmy Olsen]; Karate Kid; Dream Girl; Princess Projectra; Ferro Lad; Insect Queen [Lana Lang]; Kid Psycho (all as the Legion of Super-Heroes); Proty II; Krypto; Beppo; Comet; Streaky (all as the Legion of Super-Pets); Polar Boy; Fire Lad; Night Girl; Stone Boy; Chlorophyll Kid; Color Kid (all as the Legion of Substitute-Heroes)
- Synopsis
- Origins and powers of the Legionnaires, Subs, and Pets
- Reprints
First two pages were originally printed in Superman Annual (DC, 1960 series) #4, then reprinted with some alterations in Adventure Comics (DC, 1938 series) #316 with third and fourth pages, all of which were reprinted here with further alterations by Al Plastino, most notably in the Light Lass and Duo Damsel panels, and with the fifth and sixth pages added.
- Script
- ?
- Letters
- typeset
- Genre
- superhero
- Reprints
Expanded here across 4 pages rather than the 2 pages in the original.