00461cam a22001814a 4500003001000000005001700010008004100027020001500068040002500083041000800108044000800116080001700124100001900141245005100160260003000211650001900241655001900260AR-SsjUIB20250716140133.0250429s1978 xxk 000 0 eng d a0582554829 aAR-SsjUIBcAR-SsjUIB0 aeng axxk a802.0-07:0011 aBolitho, A. R.10aLearn english for science 1 :bteacher's book. aLondon :bLongman,c1978. 7aIngleĢs2lemb 7aLibro2unescot