(3JfXje GdGSQI GaGb GdKeGfjfGJ ai dHfGf (B: s (3fXQI eSJbHdjI hGYjI deYGLI GHYGO GdehVhY (B/ s - (3JfXje GdGSQI GaGb GdKeGfjfGJ ai dHfGfs 1980 : (3dHfGf(B)s; (3YSjQGf (B: (3Jhajbs ((3HjQhJ (B: s [(3Jhajb YSjQGf(B] : s, 1981)
(3jTJed Ydi GQLGYGJ HHdjhLQGajIs
Keywords: (3GdGSQIs -- (3GdLhGfH GdGLJeGYjIs; (3GdGSQIs -- (3dHfGfs