(3eMGUjd GdMbd (B/s - (3GdUZjQ(B, (3NjQi(B.s ([(3djHjG(B] :s (3efThQGJ LGeYI GdaGJM(B,s, 1986)
(3jMJhi Ydi bGFeI HGdeQGLY(B)(3U (B339-341)s
1
Keywords: (3GdeMGUjd GdRQGYjI(B.s