Richman, Barry M.
Random House , 1969
Buku Teks
Kumar, Krishan, author
Blackwell, 1996
Buku Teks
edited by Edward Aspinall and Marcus Mietzner
Insitute of southeast asian studies, 2010
Buku Teks
Penguin,, 1972
Buku Teks
Roberts, Fred S., author
Society for Industrial and Applied Mathematics, 1978
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