(3OQGSGJ ai GdbQBf hGdMOjK (B/ s - (3NdjaI, GMeO jhSa eMeOs ((3GdbGgQI (B((3eUQ(B) :s (3ecJHI ZQjH, s, 1981)
260-257 (3HHdjhLQGajG(B: (3UaMGJ(B.s
(3O(B. (3LGHQ YUahQ ;s
Keywords: (3GdbQBfs -- (3JaSjQs; (3GdbQBfs -- (3GSHGH GdfRhds; (3GdbQBfs -- (3Ydhes; (3GdMOjKs