Fortress of Solitude appears in 140 issues in this volume.
The Super-Key to Fort Superman!
The Super-Duel in Space / The Traffic Cop of 2058, A.D. / Safari from Space!
The Lady and the Lion
The Super-Merman of the Sea
The Return of Superman's Lost Parents!
The Battle Between Jimmy Olsen and Superman!
Superman's Fortress of Solitude!
When Superman Lost His Powers! / Supergirl's Greatest Victory!
The Superman from Outer Space! / The Day Supergirl Revealed Herself!
Hercules in the 20th Century!
The Truth Mirror!
The Old Man of Metropolis! / Supergirl's Busiest Day!
Voyage to Dimension X!
Superman's Rival, Mental Man!
The World of Mr. Mxyzptlk! / The Supergirl of Two Worlds
The Reversed Super-Powers
The Menace of Red and Green Kryptonite! : Extra! Mr. and Mrs. Kent Adopt Supergirl!
The War Between Supergirl and The Supermen Emergency Squad! / Supergirl's Three Super Girl-Friends!
The Conquest of Superman! / The Battle of the Super-Pets!
The Super Powers of Perry White!
Superman's Toughest Day! / The Supergirl of Tomorrow!
The Babe of Steel! / The Strange Bodies of Supergirl!
The World's Greatest Heroine
The Super-Practical Joker!
The New Superman! / The Bride of Mr. Mxyzptlk!
The Kryptonite Killer! / The Mutiny of Super-Horse!
Superman Goes Wild!
Clark Kent, Coward!
Clark Kent – Target For Murder! / Supergirl's Wedding Day!
Secret of Kryptonite Six!
Superman, King of Earth
King Superman vs. Clark Kent, Metallo
The Day Superman Became the Flash! / Supergirl's Tragic Ordeal!
The Juvenile Delinquents from Space! / The Menace of Supergirl's Mother!
"The Three Super-Enemies!"
The Secret Life of Clark Kent
The Legion of Super-Creatures! / The Secret of Supergirl's Suitor!
The Ultimate Enemy! / Drang, the Destroyer!
The Man from the Phantom Zone
Superman versus Super Clark Kent!
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