25.) "Superboy's First Public Appearance" from Superman #144, also reprinted in Showcase Presents Superman Vol.2 TPB.
27.) "Superman Breaks Loose" from Superman #233, also reprinted in Superman in the Seventires TPB, Millennium Edition: Superman #233, Superman: The Greatest Stories Ever Told Vol. 2 TPB, and the Superman: Kryptonite Nevermore HC.
28.) "Superman, You're Dead...Dead...Dead" from Action Comics #399, also reprinted in the Best of DC (Blue Ribbon Digest) #12.
29.) "Duel of Doom" from Action Comics #400.This story hasn't been reprinted anywhere else but this collection.
And those 29 fantastic stories are what are contained within the pages of the Superman: From the 30's to the 70's Hardcover. Be sure to check back on Friday February 5th for the contents of the SHAZAM!: From the 40's to the 70's Hardcover.