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ardelia ines, dewi farida ratna. Analisis Kinerja Portofolio Optimal Saham Sektor Pertambangan dan Saham Sektor Perdagangan. JMO [Internet]. 2017Jun.5 [cited 2024Nov.25];7(3):242-53. Available from: https://journal.ipb.ac.id/index.php/jmo/article/view/16685