(3OhQ GdbGVj aj GdETQGa Ydi JfajP GdLRGA GdLfGFj (B/s - (3GdeQUaGhj, MSf UGObs ([(3GdbGgQI(B] :s (3efThQGJ GdeQcR Gdbhej ddHMhK GdGLJeGYjI hGdLfGFjI,s, 1970)
Keywords: (3JfajP GdCMcGes; (3GdSdWI GdbVGFjIs