@book {TN_libero_mab2,
author
=
{
}
,
title
=
{
Changing roles
Teacher's book
}
,
publisher
=
{
Schöningh
}
,
isbn
=
{
3506410288
}
,
year
=
{
1984
}
,
address
=
{
Paderborn
}
,
url
=
{
http://slubdd.de/katalog?TN_libero_mab2
}
}
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