Now to the above index that JeffBert has posted. Yes we now know that "Jungle Mystery" is in three chapters in the 12/64; 1/65 & 2/65 issues of "Mighty Atom Club" magazine.
The 3/65; 4/65 & 5/65 issues feature the three part "Earth Defense Squadron/The Moon Monsters" manga adaptation.
The 6/65; 7/65; 8/65; & 9/65 issues feature the four part manga story, "Atom's Been Stolen".
It has not yet been established if the 10/65 & 11/65 issues have an Astro Boy manga story.
12/65 & 1/66 feature "Broadcasts from Outer Space".
2/66 & 3/66 feature "The Face on the Cliff".
Then the 4/66 & 5/66 issues feature the two part manga story "Ti-Tan(ium)"/(Chi-tan)
And we now know that the 6/66 & 7/66 issues featured "The Robot Fortress/Mystery of the Amless Dam" two part episode.
Thanks to BrutalDawnFawn we now know that the 8/66 issue featured "The Dolphin Civilization/Dolphins in Distress" episode and
the 9/66 & 10/66 issues featured a two part adaptation of "Cobalt goes Crazy/Demented Cobalt."
I have been unable to determine which episode was published in the 11/66 issue from that one page you posted BrutalDawnFawn, but maybe some one else might!--Astrobuddy
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