Rumble, J. R.
Adam Hilger, 1990
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Raissa Rinaldi, author
Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Indonesia, 2022
UI - Skripsi (Membership)
Morley, Arthur, author
English Language Book Society, 1962
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Srinivasan, N.K., author
New Delhi: Oxford and IBH, 1983
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Van Vlack, Lawrence H., author
Addison-Wesley, 1980
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