Whitaker, Joseph
An almanack for the year of our Lord 1987
J. Whitaker and Sons, 1987
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The Education authorities directory and annual 1987
School Government Publishing Co., 1987
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The Education authorities directory and annual 1989
School Government Publishing Co., [date of publication not identified]
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Almanak
 Buku Referensi
Directory of research in academic year 1996-97
National University of Singapore, [date of publication not identified]
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