(3ePcQGJi ai GdSjGSI hGdKbGaI (B/ s - (3KQhJ YcGTIs ([S.N] : (3OGQ GdgdGd ddWHGYI hGdfTQ , s, 1990)
Keywords: (3eUQs; (3GdGMhGd GdGLJeGYjIs; (3GdGMhGd GdSjGSjIs; (3GdePcQGJs; (3GdKbGaIs; (3GdJQGLe GdPGJjIs; (3KhQI (B23 (3jhdjh (B1952s; (3Gdafs