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Princeton University Press , 1999
Buku Teks
Reinfeld, Fred, author
Sterling Pub. Co, 1961
Buku Teks
Polish Academy of Sciences, 2008
Majalah, Jurnal, Buletin
Jones, W.T. (William Thomas), 1910-, author
University of California, [Date of publication not identified]
Buku Teks
Victor Gollancz , 1956
Buku Teks