Panggabean, R.M., author
2003
UI - Disertasi (Membership)
Pangabean, R.M., author
Universitas Indonesia, 2003
UI - Disertasi (Membership)
Panggabean, R.M., author
Universitas Indonesia, 2003
UI - Disertasi (Membership)
Hotma Timbul, author
Universitas Indonesia, 2007
UI - Tesis (Membership)
Daulay, Ikhsan Rosyada Parluhutan, author
Rineka Cipta, 2006
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