(3GdOhdQI (B: s (3OQGSI efgLjI Mhd GdfbhO hGdJUfjY heOjhfjI GdHdOGf GdeJNdaI (B/ s - (3eMehO YHOGdaVjds; (3SdGeI, HjjQs; (3YRI GHhGdfUQs ((3GdbGgQI (B: s (3OGQ GdeSJbHd GdYQHi , s, 1990)
Keywords: (3GdGbJUGOs; (3GdSjGSI GdeGdjIs; (3GdfbhOs; (3GdOhdGQs; (3GdbhI GdTQGFjIs; (3GdGfceGT GdeGdis