Kosovo Peace Plan Takes Shape As Russia Prods Serbs on Troops
Broad shape of agreement to end ethnic conflict in Serbian province of Kosovo emerges, with Russia playing key role at talks in Rambouillet, France, to persuade Serbs to allow NATO peacekeepers on their territory; French Pres Jacques Chirac says Russians, traditional ally of Serbs, feel ground force in Kosovo is best solution to stopping bloodshed in separatist province and that Russian soldiers are likely to be part of deployment; photo (M)