"Combat Under Glass!" #21
| Series | The Atom |
| Number | Vol. 1 #21 |
| Publisher | DC Comics, National Periodical Publications, Inc. |
| Date | 1965-11 |
| Type | Comic Book, Softcover |
| Language | English |
| Cover Artist | Gil Kane |
| Editor | Julius Schwartz |
| Inker | Sid Greene |
| Penciler | Gil Kane |
| Writer | Gardner Fox |
| Genre | Superhero |
| Published in | Sparta, Illinois |
| Pages | 32 |
| Characters | Atom (Ray Palmer) |
| Story Location | Connecticut, Ivy Town (present day), England; London (1752) |
| Links | https://dc.fandom.com/wiki/The_Atom_Vol_1_21 |
| Notes | 1st Story: "Combat Under Glass!" 2nd Story: The Adventure of the Canceled Birthday! |
Added by mlopinto