King, Ronold W.P., author
Springer-Verlag, 1992
Buku Teks
Silvia, Manuel T., author
Elsevier, 1979
Buku Teks
Universitas Indonesia, 2007
UI - Skripsi (Membership)
Fraser, Ronald
MacMillan Press , 1957
Buku Teks
Klein, Felix, author
Springer, 2012
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