The End Of Batman Family

Batman Family ended with issue #20 (October-November, 1978) but, Robin, Batgirl and Man-Bat all migrated to Detective Comics (along with Batman) starting with Detective Comics #481 (December-January, 1978/1979), with both covers by Jim Starlin.

Detective Comics was the one that originally was scheduled to end due to low sales, but it was decided that the title the company was named after should still be published by the company!