(3ef eYjf GdbQGf UhQ hGbYjI hbje heaGgje (B/s - (3eMehO Hf TQjas ((3GdbGgQI (B: s (3GdeDSSI GdYQHjI GdMOjKI , s, 1988)
Keywords: (3GdGSdGes; (3GdeHGMK GdYGeIs; (3GdYdhes; (3GdGYLGR GdYdei ddbQGfs; (3GdbQGfs