https://etd.repository.ugm.ac.id/penelitian/detail/418972009never1.0https://etd.repository.ugm.ac.id/penelitian/detail/418982009never1.0https://etd.repository.ugm.ac.id/penelitian/detail/434442009never1.0https://etd.repository.ugm.ac.id/penelitian/detail/434452009never1.0https://etd.repository.ugm.ac.id/penelitian/detail/434462009never1.0https://etd.repository.ugm.ac.id/penelitian/detail/434472009never1.0https://etd.repository.ugm.ac.id/penelitian/detail/443222009never1.0https://etd.repository.ugm.ac.id/penelitian/detail/443232009never1.0https://etd.repository.ugm.ac.id/penelitian/detail/448602009never1.0https://etd.repository.ugm.ac.id/penelitian/detail/448612009never1.0https://etd.repository.ugm.ac.id/penelitian/detail/451502009never1.0