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Buku Teks
edited by L. Lovasz and Vera T. Sos
North-Holland Publishing Company, 1981
Buku Teks
Gwon, Gi-thae, author
Minemsa, 2006
Buku Teks
Wong, Donna L., 1948-, author
Mosby, 1998
Buku Teks
J. P. B. Allen and S. Pit Corder edited by
Oxford University, 1980
Buku Teks