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Buku Teks
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Buku Teks
Kamala, A.
New Delhi Tata McGraw-Hill 1994,
Buku Teks
Sibarani, Marimbun, author
Fakultas Teknik Universitas Indonesia, 2008
UI - Skripsi (Open)
Davenport, S.J.
Washington, DC: United States Department of the Interior, 1954
Buku Teks