DE FACTO DIVISION BEGUN IN LEBANON
Lebanese Christians and Moslems have begun in effect to partition country by setting up state adms in their respective territories; Christians control area from eastern Beirut to southern outskirts of Tripoli; Moslems have western Beirut and southern Lebanon as well as Tripoli; Syrian Army controls eastern part of Lebanon; only party that is tightly knit and has will to organize and control citizenry is Phalangist Party headed by Pierre Gemayel and his sons Bashir and Amin; Bashir and group of Western-educated technicians have formed 'shadow cabinet' under name Popular Orgn of Lebanon; want to make town of Junieh new capital; maps (L)