Dickens, Charles, 1812-1870
Doctor marigold
Wethouse, 1945
 Buku Teks SO
Koch, Christopher J.
Boys inland / C.J. Koch
Agus and Robertson Publishers, 1986
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Koch, Christopher J.
Highways to a war / by Christopher J. Koch
Minerva, 1996
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Petersen, William
Population
Macmillan, 1961
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Petersen, William
Population
Macmillan, 1969
 Buku Teks SO