(3GdbGfhf GdOhdj GdYGe(B. s (3GdLRA GdKGfj, s (3OhQ eMceI GdYOd GdOhdjI aj JShjI GdefGRYGJ GdOhdjI hGQSGA eHGOF GdbGfhf GdOhdj GdYGe eY GdJWHjb Ydi eTcdI GdTQb GdChSW (B/ s (3JCdja GdOcJhQ YHO GdYRjR eMeO SQMGf(B. s - (3YHO GdYRjR eMeO SQMGfs ([(3ecGf GdfTQ ZjQ eMOO(B] : s [(3GdfGTQ ZjQ eMOO(B](3,s, 1987)
Keywords: (3GdfRGY hGdUQGY Hjf GdOhds; (3GdbGfhf GdOhdj GdYGes