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Sekip Unit 3 Bulaksumur Yogyakarta 55281 pekik@ugm.ac.id pekik.staff.ugm.ac.id Fakultas Matematika dan Ilmu Pengetahuan Alam

Drs. Pekik Nurwantoro, M.S., Ph.D.

Drs. Pekik Nurwantoro, M.S., Ph.D.