(3GdJMdjd GdeMGSHi(B: (3HZQV GJNGP GdbQGQGJ ai eLGd GdGfJGL hGdJShjb (B/ s - (3MUI eMeO GMeO GdHMQs ((3GdchjJ (B: s (3eDSSI GdchjJ ddJbOe GdYdei , s, 1988)
Keywords: (3GOGQI GdGYeGds; (3GdJShjbs; (3GdeMGSHIs; (3GdGfJGLs