00312nam a2200109Ia 4500008004100000020001800041040003800059100002000097245003700117260003600154300001200190211228s9999    xx            000 0 und d  a0 582 55238 9  cJayakar Knowledge Resource Centre  aLeech, Geoffrey 0aCommunicative grammer of english  bLongman Group LtdaLondonc1975  a324p p.