Lanyon-Orgill, Peter A., author
Luzac & Co., 1944
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Steingass, F., author
Antarkarya, 1986
Buku Referensi
Steingass, F., author
Antarkarya, 1986
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Wilkinson, R. J. (Richard James), 1867-1941, author
Macmillan, 1959
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Boyle, John Andrew, author
Luzac & Company, 1949
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