Zahra, Silvia, Universitas Andalas (Teknik Lingkungan)
zakaria, rahmat syahni, Socio-Economic Agriculture, Faculty of Agriculture, Andalas University
zandri, lptik
Zarkani, Agustin, University of Bengkulu
Zen, Irina Safitri, International Islamic University Malaysia, 53100 Gombak, Kuala Lumpur.
zulhakim, hazi, UNIVERSITAS ANDALAS

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