(3GdejcGfjcG GdgfOSjI (B/ s - (3fjehTfch, Ss; (3jhfL, O (B. (3g`s; (3SYjO, fUjas ((3GdeLdS GdCYdi ddYdhe,s, 1960)
Keywords: (3GdgfOSIs; (3GdehGO GdgfOSjIs