(3ZQfGWI ai Xd Hfi GdGMeQ(B: s (3OQGSI MVGQjI (B/s - (3jhSa TcQi aQMGJs ((3HjQhJ (B: s (3GdeDSSI GdLGeYjI ddOQGSGJ hGdfTQ hGdJhRjY , s, 1982)
Keywords: (3GdJGQjN GdGSdGeis; (3GdYQH ai GSHGfjGs; (3ZQfGWIs