Robertson, Deborah A., author
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Magrill, Rose Mary, author
American Library Association, 1989
Buku Teks
Perpustakaan Nasional, 1996
Buku Referensi
School Library Association , 1972
Buku Teks
Costantino Thanos, Francesca Borri, Leonardo Candela, editor
Springer, 2007
Buku Teks