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Reynal and Hitchcock, 1943
Buku Teks
Dixit, J.N. (Jyotindra Nath), 1936-2005, author
Konark Publishers, 1998
Buku Teks
Burkard, Rainer, author
Society for Industrial and Applied Mathematics, 2009
eBooks
Rinda
Universitas Indonesia, 1997
UI - Skripsi Membership
The Ronald Press , 1958
Buku Teks