Ragilia, Nila Ananda Putri (Indonesia)
Rahardianto, Adi
Rahkadima, Yulia Tri, Program Studi Teknik Kimia, Universitas Nahdlatul Ulama Sidoarjo, Sidoarjo 61218, Indonesia
Rakhmania, Amalia Eka, State Polytechnic of Malang (Indonesia)
Rakhmania, Amalia Eka (Indonesia)
Ramana, Indra Adi (Indonesia)
Rasmito, Agung (Indonesia)
Rasmito, Agung, WR Supratman University (Indonesia)
Ratnawati, Yani (Indonesia)
Redanto Putri, Fairus Atika (Indonesia)
Retnawati, Lestari, Universitas Wijaya Kusuma Surabaya (Indonesia)
Rinanto, Noorman (Indonesia)
Rochimah, Siti (Indonesia)
Romadhoni, Romadhoni (Indonesia)
Rospawan, Ali, National Chung Hsing University (Taiwan, Province of China)
Rosyidah, Elsa (Indonesia)
ROSYIDI, MOH RIRIN (Indonesia)
Rozi, Nanang Fakhrur, Institut Teknologi Adhi Tama Surabaya (Indonesia)
Rusmal, Rizky, Institut Teknologi Adhi Tama Surabaya (Indonesia)

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