Superman Supacomic #14

K.G. Murray's Superman Supacomic #14 was published c.September 1960:

The cover is from Superman #137:

The stories:

Chapter I: The Super-Brat from Krypton; Chapter II: The Young Super-Bully; Chapter III: Superman vs. Super-Menace!, originally published in Superman #137, May 1960

The Dog That Betrayed Batman, originally published in Batman #131, 1960

The Millionaire Pupil!, originally published in Superboy #81, June 1960

The Martian from Gotham City, originally published in Batman #132, June 1960

Life on Krypton!, originally published in Superboy #79, March 1960

The Creatures that Stalked Batman, originally published in Detective Comics #279, May 1960

The Boy Who Was Stronger than Superboy!, originally published in Adventure Comics #273, Jun 1960 

The Alien Who Doomed Robin, originally published in World's Finest Comics #110, July 1960 

Many of these stories were subsequently republished in other KG Murray issues.

There is an advertiser's date code on the inner front cover SS9/60 - a proxy cover date. AusReprints notes a copy had 17 November 1960 written or stamped on it.