Geographical Coverage of Authors: Philippines and Indonesia (Provinces: North Sumatra and West Sumatra).
DOI:
https://doi.org/10.55537/spk.v3i2.787
DOI:
https://doi.org/10.55537/spk.v3i2.789
DOI:
https://doi.org/10.55537/spk.v3i2.884
DOI:
https://doi.org/10.55537/spk.v3i2.889
DOI:
https://doi.org/10.55537/spk.v3i2.931
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