Zoetmulder, P. J. (Petrus Josephus), author
Obor, 1958
Buku Klasik
Liaw, Yock Fang, 1936-, author
Times Book , 1992
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Heaton, J.B.
Longman Croup UK Limited, 1988
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Bamberger, Richard
Jugend und Volk, 1984
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Bundesverwaltungsamt, 1975
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