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This issue has been available online since 28th February 2019 for the regular issue of February 2019. A total of 10 articles in this issue were authored/co-authored by 40 authors from 1 country (Indonesia)
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Journal of Technomaterial Physics
Website: http://jotp.usu.ac.id
E-mail: jotp@usu.ac.id
Dept. of Physics, FMIPA, University of Sumatera Utara
Jl. Bioteknologi No.1, Padang Bulan, Medan 20155
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