Published: 2019-06-15

DOI: https://doi.org/10.26477/jbcd.v31i2.2616
DOI: https://doi.org/10.26477/jbcd.v31i2.2617
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DOI: https://doi.org/10.26477/jbcd.v31i2.2622
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DOI: https://doi.org/10.26477/jbcd.v31i2.2626
DOI: https://doi.org/10.26477/jbcd.v31i2.2627