http://repository.uhamka.ac.id/id/eprint/11975/ IOP kaemferia 2021 Hikmawanti, Ni Putu http://repository.uhamka.ac.id/id/eprint/11975/1/IOP_Conf._Ser.__Earth_Environ._Sci._819_2021%20%28kaemferia%29.pdf Unduh!