00451cam a22001814a 4500003001000000005001700010008004100027040002500068041000800093044000800101080001300109100002000122245004000142260003000182650001900212655001900231700001900250AR-SsjUIB20250710145500.0250429s1979 xxk 000 0 eng d aAR-SsjUIBcAR-SsjUIB0 aeng axxk a802.0-071 aLeech, Geoffrey10aA communicative grammar of english. aLondon :bLongman,c1979. 7aIngleĢs2lemb 7aLibro2unescot1 aSvartvick, Jan