English 900 / prepared by English Language Services, Inc.
Collier McMillan , 1964
Buku Teks SO
Ewer, J.R.
A course in basic scientific English
Longman, 1969
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McArthur, Thomas Burns
A rapid course in English for student of economics
Oxford University Press, 1983
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Allsop, Jake
English for Cambridge first certificate: a new course
Cassell, 1981
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Building English skills yellow level / prepared by Staff of the Writing Improvement Project
Illinois McDougal, 1977
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