(3eYLe eUWdMGJ GdJMdjd GdfaSj (B/ s - (3dGHdGfT, LGfs; (3L(B.(3H(B.(3, HhfJGdjSs ((3HjQhJ (B:s (3GdeDSSI GdLGeYjI ddOQGSGJ h GdfTQ,s, 1987)
Keywords: (3GdJMdjd GdfaSjs; (3GdbhGejSs; (3eYGLe GdeUWdMGJs