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1
Atlas 1: learning-centered communication / Angela Llanas, Libby Williams.
Boston : Heinle & Heinle Pulishers, 1995.
65 tr. ; 25 cm.
2
Atlas 3 : learning-centered communication / David Nunan, Fran Byrnes, Angela Llanas, Libby Williams.
Boston, Mass. : Heinle & Heinle, 1995
136 tr. ; ill. ; 28 cm. :



3
Atlas 3 : learning-centered communication : Workbook / David Nunan, Fran Byrnes, Angela Llanas, Libby Williams.
Boston, Mass. : Heinle & Heinle, 1995
67 tr. ; 28 cm.
4
Atlas 4 : learning-centered communication : Workbook / Angela Llanas, Libby Williams.
Boston : Heinle & Heinle Publishers, 1995.
75 tr. : ill. ; 28 cm.