Senelle, Robert
The Political, economic and social structures of Belgium / Robert Senelle
Ministry of Foreign Affairs and External Trade , 1979
 Buku Teks
Godfrey, M.G.
Revision statistics
Edward Arnold , 1986
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Rice, Scott
From reading to revision
Wadsworth, 1996
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Presley, John W.
To be exact: a guide for revision
Prentice-Hall, 1982
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Hicks, John R.
A revision of demand theory
Clarendon Press, 1959
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