The inks credit was verified by Robinson.
Inside front cover. Memorializes Bill Finger.
This is an inner cover printed on glossy paper (the rest of the book is newsprint).
The inks credit was verified by Robinson.
The background inks and letters credits were verified by Moldoff.
There is an earlier chronological appearance (and origin) of the Joker in Detective Comics #168.
Robinson verified with Gary Watson in July 2009 that he did some penciling (including the Joker's card on the splash page specifically), in addition to the background inks and lettering he already confirmed.
All Gustavson credits verified and courtesy of Terry Gustafson, Paul Gustavson's son.
Oddity: Machine guns are mounted on the Batplane, which are used to kill.
The background inks and letters credits were verified by Robinson.
The Cat was later renamed Cat-Woman or Catwoman.
The background inks and letters credits were verified by Robinson.
As recounted in various sources, the Joker was supposed to die of his stab wound at the end of the story, but the editors decided this villain was too good to kill off, so the last panels were re-drawn to show him surviving. The last panel of the story, titled "Golden Rules for Robin's Regulars", introduces readers to "Robin's Code" of conduct.
The background inks and letters credits were verified by Robinson.
Reprinted from the original back cover.