After Scotland Yard Inquiry, A Village in Kosovo Buries 64
Bodies of 64 ethnic Albanians, slain by Serbs in village of Bela Crkva hours after NATO bombing began on March 25, are reburied following exhumation from mass graves for collection of evidence by war crimes investigators from Scotland Yard; emotional scene described; Scotland Yard's chief investigator John T Bunn says 60 victims were shot in individual groups, in deliberate fashion, along riverbank; photos (M)