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London, Baterworth, 1932
Buku Teks
Edwards, Heather M., 1947-, author
Scarecrow Press, 1990
Buku Teks
Thompson, James, author
Clive Bingley, 1987
Buku Teks
Thompson, James, author
Clive Bingley , 1987
Buku Teks
Japan : University of Library and Information Science
Majalah, Jurnal, Buletin