00391nam a2200133 a 450000500170000000800410001702000180005804100080007608200080008410000260009224500580011826400580017630000230023420260717092737.0260717s1997    ii            000 0 eng d  a9780521530323  aeng04a4201 aCrystal, David, 1941-10aEnglish as a Global Language /cCrystal, David, 1941- 1aCambridge :bCambridge University Press,cc1997,2010.  axv, 212 p. ; 22 cm