DC Comics published Batman Family from September-October 1975 to October-November, 1978. It lasted 20 issues.
Batman Family started out as a giant-sized (68 pages) team-up book featuring stories of the Dynamite Duo of Robin the Boy Wonder and Batgirl; these were supported by reprinted stories from the Batman comics of previous decades. The format reverted to regular-sized with #5, however, still with new stories but with mediocre art and writing. With issue #17, the 68-page format returned, this time with the title as a Dollar Comic, and slightly better material; this only lasted a few issues, however, as the series was cancelled with #20.