https://etd.repository.ugm.ac.id/penelitian/detail/33012000never1.0https://etd.repository.ugm.ac.id/penelitian/detail/33052000never1.0https://etd.repository.ugm.ac.id/penelitian/detail/33072000never1.0https://etd.repository.ugm.ac.id/penelitian/detail/33082000never1.0https://etd.repository.ugm.ac.id/penelitian/detail/33112000never1.0https://etd.repository.ugm.ac.id/penelitian/detail/34652000never1.0https://etd.repository.ugm.ac.id/penelitian/detail/35002000never1.0https://etd.repository.ugm.ac.id/penelitian/detail/35122000never1.0https://etd.repository.ugm.ac.id/penelitian/detail/35182000never1.0https://etd.repository.ugm.ac.id/penelitian/detail/37722000never1.0https://etd.repository.ugm.ac.id/penelitian/detail/37732000never1.0https://etd.repository.ugm.ac.id/penelitian/detail/37752000never1.0https://etd.repository.ugm.ac.id/penelitian/detail/37862000never1.0