Ramlan
Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Indonesia, 2012
UI - Tesis Open
Budi Setiawan
Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Indonesia, 2016
UI - Tesis Membership
van der Veur, Paul W.
Australian National University Press, 1966
Buku Teks SO
by Department of External Affairs Canada
Department of External Affairs, 1963
Buku Teks SO
Bascom, Willard
Douldery, 1961
Buku Teks SO