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Sari, Ermina and Awal, Raudhah and Martalasari, Martalasari and Sudarmin, Sudarmin (2024) Validity and practicality of ethnovlog media on the production of typical Riau smoked fish (salai) as a science learning media. Biosfer, 17 (1). pp. 233-242. ISSN 0853-2451