(3GdJUhjQ GdHjGfi (B: s (3OQGSI JMdjdjI deSGFd GdHjGf (B/ s - (3GHh ehSi (B: (3eMeOs ((3GdbGgQI (B: s (3ecJHI hgHI (B: s, 1980)
(3jTJed Ydi GQLGYGJ HjdjhLQGajIs
Keywords: (3GdHdGZI GdYQHjIs -- (3GdHjGfs