Kochtanek, Thomas R., author
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Buku Teks
Gorman, Michael, author
Libraries Unlimited, 1990
Buku Teks
Veith, Richard H., author
G.K. Hall, 1988
Buku Teks
Rowley, Jennifer, author
Gower , 2000
Buku Teks
Rowley, Jennifer, author
Ashgate , 2004
Buku Teks