Browsing by Author Siahaan, Ricky Hartono
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| Issue Date | Title | Author(s) | ???itemlist.dc.contributor.advisor??? |
|---|---|---|---|
| 2019 | Laporan Praktek Kerja Lapangan di PT. Perkebunan Nusantara IV Unit Kebun Sei Kopas | Simatupang, Seprindo; Siahaan, Ricky Hartono; Sihombing, Junus A | Abdina, Muhammad Fadly |