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Nai Sarak: Khanna, c1980
Buku Teks
Zinoviev, VL.A.
The Higher School, [19--]
Buku Teks
Christian, John, author
John Wiley & Sons, 1981
Buku Teks
Aria Kusuma, author
Fakultas Kesehatan Masyarakat Universitas Indonesia, 2005
UI - Tesis Membership
Steeds, W.
Longman, 1964
Buku Teks