(3GdLeY GdUhJj GdChd ddbQBf (B: s (3GdeUMa GdeQJd YQV hOQGSI dHhGYK GdeTQhY heNWWGJI (B/ s - (3SYjO, dHjHs ((3GdbGgQI (B: s (3OGQ GdeYGQa, s, 1978)
Keywords: (3GdbQBf GdcQje(B. s; (3bQGAGJ GdbQBf GdSHY(B. s