Rahayu, Aster, Universitas Ahmad Dahlan
Rahayu, Aster, Unversitas Ahmad Dahlan
Rahayu, Wahidah Mahanani, Universitas Ahmad Dahlan
Rahayuningsih, Edia, Universitas Gadjah Mada
Rahmadhia, Safinta Nurindra, Universitas Ahmad Dahlan
Rahmah, Rahmah, Universitas Ahmad Dahlan
Rahman, Muhammad Miftahur, Universitas Gadjah Mada
Rahmanta, Anugrah Perdana, Politeknik LPP
Rahmatillah, Mitha Ulli, Universitas Ahmad Dahlan
Rahmawati, Elok
Rahmayanti, Maya, UIN Sunan Kalijaga
Ramadani, Noorpani, Chemical engineering department of UAD
Ramadhani, Firdaus, Universitas Ahmad Dahlan
Ramadhani, Umi, Universitas Bung Hatta
Ramandani, Adityas Agung, Yuan Ze University
Ramdani, Fitri, Universitas Gadjah Mada
Rasidah, Rasidah, Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Palangka Raya
Ratnawati, Devi, Department of Chemistry Faculty of Mathematics and Natural Sciences Universitas Bengkulu
Respati Saputra, Sofian Pradipta, Universitas Sebelas Maret
Retnowati, Retnowati, STIKes Perintis Padang
Rivelino, Harry Pramudya, Universitas Sebelas Maret
Riyanto, Ahmad, PT. Semen Indonesia (Persero) Tbk.
Rochmadi, Rochmadi, Politeknik LPP
roni, kiagus ahmad, Universitas Muhammadiyah Palembang
Rosmainar, Lilis, Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Palangka Raya

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