Simpson, George Gaylord, author
Harcourt Brace & World, 1964
Buku Teks
Simpson, George Gaylord, author
Yale University Press, 1967
Buku Teks
Harun Yahya, author
Dzikra, 2004
Buku Referensi
Coon, Carleton S., author
Alfred A. Knopf, 1962
Buku Teks
Joseph Seckbach, editor
[, Springer], 2012
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