(3eG de jfTQ ef JQGK GdLGMX (B: s (3GdQO Ydi GdeTHgI hGdeSGFd hGdLhGHGJ ai GdeYQaI (B/s - (3GdLGMX (B: s (3J(B868 (3Gh (B9s; (3GdVGef (B: (3MGJe UGdMs ((3HZOGO (B: s (3OGQGdMQjI ddWHGYI (B: s, 1979)
(3jTJed Ydi GQLGYGJ HHdjhLQGajI(B((3U(B41 - 45)(3hcTGaGJs
Keywords: (3GdLGMX (B: s -- (3J(B868 (3Gh (B9s; (3GdJhMjO(B((3JUha GSdGei(B)s; (3Yde GdcdGes