(3eheS JDda cJGHG h eSQMGJ CNQi (B. /s - (3QVhGf , aJMj s ([(3Ohf ecGf(B] :s [(3Ohf fGTQ(B] (3,s, 1981)
Keywords: (3JDdas; (3cJGHG s; (3eSQMGJ (B.s; (3eheSs