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1gan Troitzsch, Jurgen“...Hanser ; Distributed in the United States of America and Canada by Oxford University Press,...”
Cyhoeddwyd 1990
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2Cyhoeddwyd 1992“...Hanser Publishers ; Distributed in the United States of America and in Canada by Oxford University Press,...”
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3Cyhoeddwyd 1991“...Hanser Publishers : Distributed in the United States of America and in Canada by Oxford University Press,...”
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4gan Birley, Arthur W.“...Hanser Publishers ; Distributed in the United States of America and Canada by Oxford University Press,...”
Cyhoeddwyd 1992
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