The bomb planted near the Center for International Affairs library Oct. 14 did "miraculously negligible" damage, said Maury Feld, Librarian of the OFIA, last week.

Although the explosion blew apart three offices adjacent to the library, no books were lost. The only library materials severely damaged were newspapers, normally discarded every three months.

Laurence S. Finkelstein, secretary of the CFIA, said yesterday that no private files were destroyed in the

blast. "If there had been any," he said, "I would have known of them."

The library instituted a system of screening prospective users when it reopened Oct. 26. Pass cards signed by CFIA officers now must be shown to a guard before entering the building.

The new system was necessary, said Feld, because the library was an easy target for bombing. "It is conspicuous and vulnerable and open at all times," he said.

Total cost of the repairs was estimated by the Department of Buildings and Grounds to be $25,000. "Repairs, I think, are still underway," Robert Mullen, director of B and G's purchasing and insurance, said yesterday.