> Multivolume work
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Student's book:
Economics Student's book Christopher St. J. Yates
London: Cassell, 1991
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Teacher's book:
Economics Teacher's book Christopher St. J. Yates
London: Cassell, (1989)
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Kompaktkassette 2:
Economics Kompaktkassette 2 Units 9 - 15 Christopher St. J. Yates
London: Cassell, 1989
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Kompaktkassette 1:
Economics Kompaktkassette 1 Units 1 - 8 Christopher St. J. Yates
London: Cassell, 1989