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1دورية
المؤلفون: Limbong, Tonni, Simarmata, Janner, Tambunan, ARS, Siagian, Parulian, Panjaitan, Joel, Siagian, Lestina, Sitorus, Erbin, Frans, Marvin, Hutabarat, Sakti, Suganda, Abba, and, Girsang, Lumbanbatu, Katen
المصدر: IOP Conference Series: Materials Science and Engineering; September 2018, Vol. 420 Issue: 1 p012094-012094, 1p
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2دورية
المؤلفون: Yohanes, Eko, Siagian, Parulian, Widodo, Basuki, Nani, Tutut, Suwandono, Purbo, Siagian, Lestina, Gultom, Tumiur
المصدر: IOP Conference Series: Materials Science and Engineering; September 2018, Vol. 420 Issue: 1 p012044-012044, 1p
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3دورية
المؤلفون: Ula, Mutammimul, Darnila, Eva, Siagian, Parulian, Siagian, Lestina, and, Peristiwanto, Sinambela, Marzuki
المصدر: IOP Conference Series: Materials Science and Engineering; September 2018, Vol. 420 Issue: 1 p012047-012047, 1p
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4دورية
المؤلفون: Ria, Jenni, and, Rajagukguk, Siagian, Lestina
المصدر: IOP Conference Series: Materials Science and Engineering; September 2017, Vol. 237 Issue: 1 p012030-012030, 1p