Bishop, A. C.
Cambridge University Press, 1999
Buku Referensi
ed. by Harriet Stewart-Jones
Grange Books, 1998
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Idriess, Ion L.
Angus and Robertson, 1963
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Aditya Awalludien W.
Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Indonesia, 2022
UI - Skripsi Membership
Johannsen, Albert
University of Chicago Press, 1937
Buku Teks