Artikel Jurnal
Lauts, Gerard, author
Frederik Muller, 1859
Buku Teks
Carl E. Taylor ... [et al.]
John Hopkins University Press, 1983
Buku Teks
Arnfried A. Kielmann ...[et al.]
John Hopkins University Press, 1983
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Melkote, Srinivas
Newbury Park, Calif. : Sage Publications,, 1991
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