Vow War on Gangs to Avenge BerrellCHICAGO, July 25.—(/P)—Over the grave of Patrick Berrell, slain president of the International Brotherhood of Teamsters, laborleaders attending his funeral todaydeclared an organized war to resist racketeer domination.Berrell, with his bodyguard. Willie Marks, was killed by machine gunners at an inn near Shawano, Wis., last Wednesday night.Labor leaders hold remnants of the gang directed by the late Georae Lark'c responsible, and police are seeking James S .mmons, gangster reecr.tlv fre«d from Joliet prison, for the killings.