(3JbQjQ GddLfI GdJMVjQjI dOhQI GdLeYjI GdYGeI GdGSJKfGFjI GdecQSI dfRY GdSdGM (B:s (3GdeLdO GdKGfj (B/s - (3GdCee GdeJMOI(B.s ((3fjhjhQc (B:s (3GdLeYjI GdYGeI (B- (3GdCee GdeJMOI,s, 1978)
(3GdedMb Qbe (B1.s
(3GdhKGFb GdQSejI(B: (3GdOhQI GdGSJKfGFjI GdYGTQI(B.s
Keywords: (3GdbGfhf GdOhdj GdYGe(B.s; (3LeYjGJ fRY GdSdGM(B.s