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UI - Tesis (Membership)
Edwards, Frederick H., author
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Buku Teks
Klir, George J., author
D. Van Nostrand, 1972
Buku Teks
Pfeiffer, Paul E., author
McGraw-Hill, 1964
Buku Teks
Lee, Samuel C., author
Erlangga, 1987
Buku Teks