This N.Y. Daily News reporter's account of a girl gang in Manhattan's Spanish Harlem is based on the reports of a Youth Board Worker (her summaries and contact records) and it will introduce you to the Dagger Debs, nobody's darling daughters. ""We got nothin'. We ain't nothin'. So we got nothin' to lose."" -- this is the economic fact of life behind the field trip which will take you from their rat-infested homes to the candy store where they hang out, along with some of the boys; Carla, who clawed her way to leadership; Rena, her second in command, who was pregnant (these youngsters ""use sex"" but don't enjoy it) and had a record by the time she was 12; pretty, plump Poodie who at 16 still sucks her fingers; Maria who is hooked on heroin at 14; Big Indio who has a ""bad knife habit"" which will lead to the stabbing and shooting of Luis; etc., etc... Another West Side story of a by o means localized problem, which has had other kinds of coverage, retold with a smattering of socio-psychological insights (not enough to secure a professional audience) along with the gang slang.