Undated (AP) _ ''If there is no advance on this point, it would be very difficult to go any further in the peace process.'' - Costa Rican President Oscar Arias, discussing Nicaragua's refusal to negotiate a cease-fire with Contra rebels.

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''We will work unremittingly at these meetings for a palpable breakthrough, for concrete results in reducing strategic offensive armaments and barring weapons from outer space - the key to removing the nuclear threat.'' - Soviet leader Mikhail S. Gorbachev, telling his nation about plans for his summit with President Reagan next month.

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''Next, we're going to find out he has parking tickets from 1975 that are unpaid.'' - Dan Casey, of the American Conservative Union, commenting on reports of Supreme Court nominee Douglas H. Ginsburg's stock holdings.