BOSTON (AP) _ A self-styled revolutionary admitted in federal court to taking part in bombings and bank robberies as part of a campaign to overthrow the government.

Carol Ann Saucier Manning, 32, admitted Thursday to three of the charges she faces with four remaining defendants in the U.S. District Court trial that is scheduled to start Jan. 9.

''I want this over with. The evidence that convicted me in Brooklyn will convict me here,'' Manning said at a two-hour hearing in the Boston court. ''I do not want to go through this again. I want to know what's ahead for me.''

Manning, already serving 15 years in her 1986 New York City conviction on bombing charges, said she plans to seek her high school equivalency diploma and learn a skill in prison. She faces another 60 years in prison and $60,000 in fines on the latest charges.

Manning pleaded guilty to racketeering, conspiring to racketeer and seditious conspiracy, but was allowed to invoke the Alford Doctrine, in which the defendant does not admit guilt but enters the plea to take advantage of a plea-bargain offer.

Assistant U.S. Attorney Michael Loucks fought Manning's petition, saying there was no plea agreement and such a plea was not in the public interest, since it ''eliminates a potential avenue for discovering now-decaying and extremely usable dynamite'' that the group is alleged to have used.

He argued that only some of 1,166 sticks of dynamite have been recovered. ''This would leave about 390 sticks of dynamite and water gel explosives and 84 blasting caps, at a minimum, unaccounted for.''

U.S. District Judge William G. Young allowed the change in plea after ensuring that Manning knew which rights she was forfeiting.

The three-count indictment charged her and the other four remaining defendants with engaging in a conspiracy to rob banks and bomb military offices, defense contractors and other institutions from 1976 to 1985. A Boston courthouse worker lost a leg and 21 other people were injured in one 1976 bombing.

All but one of the defendants are serving jail sentences for previous convictions on other charges related to the bombings and robberies.