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1per Schirmer, Barbara R.Matèries “...Deaf Means of communication Study and teaching (Elementary)...”
Publicat 2000
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2per Paul, Peter V.Matèries “...Deaf Means of communication Study and teaching....”
Publicat 2001
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3per Quigley, Stephen P. (Stephen Patrick), 1927-Matèries “...Deaf Means of communication Study and teaching....”
Publicat 1984
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4per McAnally, Patricia L., 1927-Matèries “...Deaf Means of communication Study and teaching United States....”
Publicat 2004
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