Released in March 1967, nothing truly significant:
http://www.dcindexes.com/timemachine/releasedate.php?year=1967&month=3

Aquaman #33
Batman #191
Flash #170
Justice League #53
Superboy #138
Teen Titans #9
Superman #196
Wonder Woman #170
Action #350
Adventure #356
Detective #363 -- Batgirl's second appearance
If only I could have been born a couple months earlier, and at least had the cover date for DETECTIVE #359.

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