(3CSHGH fRhd GdbQBf (B/s - (3GdhGMOj, Ydj Hf CMeO Hf eMeO,s (3J(B. 468 (3g`(B.s; (3RZdhd, ceGds ((3HjQhJ (B:s (3OGQ GdcJH GdYdejI,s, 1991)
(3jTJed Ydi EQLGYGJ HHdjhLQGajI(B.s
Keywords: (3GdbQBfs -- (3CSHGH GdfRhd s