4 1 10 John R.Searle Additional Author mixed material 0521597447 New York 2002 a brief introduction John R.Searle Additional Author mixed material 0195157338 New York and Oxford Oxford University Press 2004 philosophy in the real world John R.Searle Additional Author mixed material 0465045197 New York Basic Books 1998 an essay in the philosophy of language John R.Searle Additional Author mixed material 052109626X Melbeurne