Speight, James G.
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Schneid, Thomas D.
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Buku Teks
editor, Spyros Doxiadis; editorial committee, Alastair Campbell V....[et al.]
John Wiley & Sons, 1990
Buku Teks SO
Hall, George M.
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Buku Teks
edited by Gary Edson
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Buku Teks SO