NATO AUTHORIZES BOMB STRIKES; PRIMAKOV, IN AIR, SKIPS U.S. VISIT
NATO authorizes air strikes against Serbia as Pres Clinton declares that force is necessary to halt aggression by Serbs against ethnic Albanians in Kosovo; air campaign, using primarily US aircraft and cruise missiles, is poised to begin over southern Serbia and targets in Kosovo on March 24; Clinton says that if Yugoslav Pres Slobodan Milosevic is not willing to make peace, US and NATO are willing to limit his ability to make war; says not acting against Milosevic would 'discredit' NATO; Senate votes 58 to 41 in support of resolution authorizing Clinton to carry out bombing and missile attacks; photo (M)