http://repository.uhamka.ac.id/id/eprint/12293/ Dokumen Prosiding IOP Series Maesaroh, Maesaroh http://repository.uhamka.ac.id/id/eprint/12293/1/Table%20of%20Content%20IOP%20Conference%20Series_%20Earth%20and%20Environmental%20Science%2C%20Volume%20755%2C%202021.pdf Unduh!