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8по Widiyanto, Y. Sigit, Kusumah, S. Dloyana, Gurning, Elizabeth T., Purnama, YusarGet Fulltext
Опубликовано 1999
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11по Soepono, Sri Saadah, Hartini, Sri, Lindyastuti, Ernayanti, Guritno, Sri, Lestariyati, F. Sri, Sembiring, Kencana, Gurning, Elizabeth T.Get Fulltext
Опубликовано 2004
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13по Simanullang, BinsarДругие авторы: “...Gurning, Elizabeth T....”
Опубликовано 1999
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