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1.

図書
図書
1. Effective English for business. 5th ed
Robert R. Aurner, Paul S. Burtness
出版情報: Cincinnati : South-Western, c1962
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2.

図書
図書
2. Effective communication in business. 3rd ed
Robert R. Aurner
出版情報: Cincinnati : South-western Pub., c1950
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3.

図書
図書
3. Effective communication in business. 7th ed.
Morris Philip Wolf, Dale F. Keyser, Robert R. Aurner.
出版情報: Cincinnati : South-Western Pub. Co., c1979.
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