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Ardana, Syafira (2019) Reusability Katalis Silika-Titania dalam PembuatanBiodiesel berdasarkan Optimasi Waktu Reaksi. Skripsi thesis, Universitas Negeri Padang.
Ardana, Syafira and Putra, Ananda and Latisma, Dj. and Sundari, Rita and Bahrizal, Bahrizal and Etika, Sri Benti and Nizar, Umar Kalmar (2019) The Study of Reused SilicaTitania Catalyst on Biodiesel Production in Various Reaction Times. International Journal of Advances in Scientific Research and Engineering (ijasre), 5 (8). pp. 133-141. ISSN 2454-8006